feat: Implement comprehensive performance optimizations
- Add database indexes for common query patterns (path, callsign, device, weather) - Implement packet batching in LiveView to reduce client updates - Create PreparedQueries module for frequently executed database queries - Add KNN (K-nearest neighbors) spatial queries using PostGIS - Implement configurable debouncing for map bounds and hover events - Integrate with existing Redis cache for device lookups - Optimize cleanup worker with batch processing (already implemented) These optimizations significantly improve query performance and reduce database load, especially for high-traffic scenarios. 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
This commit is contained in:
parent
c8ae4aecaf
commit
11dbf8215c
7 changed files with 455 additions and 68 deletions
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@ -204,6 +204,16 @@ defmodule Aprsme.DeviceIdentification do
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def lookup_device_by_identifier(nil), do: nil
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def lookup_device_by_identifier(identifier) when is_binary(identifier) do
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# Use device cache for better performance
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if Code.ensure_loaded?(Aprsme.DeviceCache) do
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Aprsme.DeviceCache.lookup_device(identifier)
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else
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# Fallback to direct DB lookup if no cache available
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lookup_device_from_db(identifier)
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end
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end
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defp lookup_device_from_db(identifier) do
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# Fetch all device patterns from DB
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devices =
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try do
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@ -10,9 +10,9 @@ defmodule Aprsme.Packets do
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alias Aprs.Types.MicE
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alias Aprsme.BadPacket
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alias Aprsme.Packet
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alias Aprsme.Packets.PreparedQueries
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alias Aprsme.Packets.QueryBuilder
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alias Aprsme.Repo
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alias AprsmeWeb.TimeUtils
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require Logger
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@ -480,51 +480,28 @@ defmodule Aprsme.Packets do
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@impl true
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@spec get_nearby_stations(float(), float(), String.t() | nil, map()) :: [struct()]
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def get_nearby_stations(lat, lon, exclude_callsign \\ nil, opts \\ %{}) do
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limit = Map.get(opts, :limit, 10)
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hours_back = Map.get(opts, :hours_back, 1)
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cutoff_time = TimeUtils.hours_ago(hours_back)
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# Use KNN (K-nearest neighbors) query for better performance
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results = PreparedQueries.get_nearby_stations_knn(lat, lon, exclude_callsign, opts)
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# Use named prepared statement for better performance (future optimization)
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# _statement_name = if exclude_callsign, do: "nearby_stations_exclude", else: "nearby_stations"
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# Use DISTINCT ON for better performance than window functions
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# First get most recent packet per callsign, then order by distance
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# Add spatial bounds to use indexes effectively
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query = """
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SELECT * FROM (
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SELECT DISTINCT ON (p.base_callsign)
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p.*,
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ST_Distance(p.location::geography, ST_SetSRID(ST_MakePoint($2, $1), 4326)::geography) as distance
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FROM packets p
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WHERE p.has_position = true
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AND p.received_at >= $3
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AND p.location IS NOT NULL
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#{if exclude_callsign, do: "AND p.sender != $4", else: ""}
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AND ST_DWithin(
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p.location::geography,
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ST_SetSRID(ST_MakePoint($2, $1), 4326)::geography,
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100000 -- 100km radius for initial filtering
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)
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ORDER BY p.base_callsign, p.received_at DESC
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) AS recent_packets
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ORDER BY distance ASC
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LIMIT #{if exclude_callsign, do: "$5", else: "$4"}
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"""
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params =
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if exclude_callsign do
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[lat, lon, cutoff_time, exclude_callsign, limit]
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# Convert results back to Packet structs if needed
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Enum.map(results, fn result ->
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# If result is already a Packet struct, return it
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if is_struct(result, Packet) do
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result
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else
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[lat, lon, cutoff_time, limit]
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# Otherwise, create a minimal Packet struct from the map
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%Packet{
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sender: result.callsign,
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base_callsign: result.base_callsign,
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lat: result.lat,
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lon: result.lon,
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received_at: result.received_at,
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symbol_table_id: result.symbol_table_id,
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symbol_code: result.symbol_code,
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comment: result.comment
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}
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end
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case Repo.query(query, params) do
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{:ok, result} ->
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Enum.map(result.rows, &Repo.load(Packet, {result.columns, &1}))
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{:error, _} ->
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[]
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end
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end)
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end
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@doc """
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@ -780,10 +757,8 @@ defmodule Aprsme.Packets do
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"""
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@spec get_latest_packet_for_callsign(String.t()) :: struct() | nil
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def get_latest_packet_for_callsign(callsign) when is_binary(callsign) do
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callsign
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|> QueryBuilder.callsign_history(%{limit: 1})
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|> QueryBuilder.with_coordinates()
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|> Repo.one()
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# Use prepared statement for better performance
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PreparedQueries.get_latest_packet_for_callsign(callsign)
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end
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@doc """
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@ -803,18 +778,8 @@ defmodule Aprsme.Packets do
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Check if a callsign has any weather packets.
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"""
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def has_weather_packets?(callsign) when is_binary(callsign) do
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import Ecto.Query
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query =
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from p in Packet,
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where: p.sender == ^callsign,
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where:
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not is_nil(p.temperature) or not is_nil(p.humidity) or not is_nil(p.pressure) or
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not is_nil(p.wind_speed) or not is_nil(p.wind_direction) or not is_nil(p.rain_1h),
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limit: 1,
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select: true
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Repo.exists?(query)
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# Use prepared statement for better performance
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PreparedQueries.has_weather_packets?(callsign)
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end
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defp get_latest_weather_in_window(callsign, hours) do
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145
lib/aprsme/packets/prepared_queries.ex
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145
lib/aprsme/packets/prepared_queries.ex
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@ -0,0 +1,145 @@
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defmodule Aprsme.Packets.PreparedQueries do
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@moduledoc """
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High-performance queries using prepared statements and efficient patterns.
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These queries are designed for frequently executed operations.
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"""
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import Ecto.Query
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alias Aprsme.Packet
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alias Aprsme.Repo
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@doc """
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Get the latest packet for a callsign using a prepared statement.
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This is one of the most frequently called queries.
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"""
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@spec get_latest_packet_for_callsign(String.t()) :: Packet.t() | nil
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def get_latest_packet_for_callsign(callsign) when is_binary(callsign) do
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normalized = String.upcase(String.trim(callsign))
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Repo.one(
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from(p in Packet,
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where: fragment("upper(?)", p.sender) == ^normalized,
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order_by: [desc: p.received_at],
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limit: 1,
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select: %{p | lat: fragment("ST_Y(?)", p.location), lon: fragment("ST_X(?)", p.location)}
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)
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)
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end
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@doc """
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Get recent packets within bounds using prepared statement.
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"""
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@spec get_recent_packets_in_bounds(list(), integer()) :: [Packet.t()]
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def get_recent_packets_in_bounds([north, south, east, west] = _bounds, hours_back \\ 1) do
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time_ago = DateTime.add(DateTime.utc_now(), -hours_back * 3600, :second)
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Repo.all(
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from(p in Packet,
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where: p.has_position == true,
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where: p.received_at >= ^time_ago,
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where: fragment("ST_Y(?) BETWEEN ? AND ?", p.location, ^south, ^north),
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where: fragment("ST_X(?) BETWEEN ? AND ?", p.location, ^west, ^east),
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order_by: [desc: p.received_at],
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limit: 500,
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select: %{p | lat: fragment("ST_Y(?)", p.location), lon: fragment("ST_X(?)", p.location)}
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)
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)
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end
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@doc """
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Check if callsign has weather packets using prepared statement.
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"""
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@spec has_weather_packets?(String.t()) :: boolean()
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def has_weather_packets?(callsign) when is_binary(callsign) do
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normalized = String.upcase(String.trim(callsign))
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query =
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from(p in Packet,
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where: fragment("upper(?)", p.sender) == ^normalized,
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where:
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not is_nil(p.temperature) or
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not is_nil(p.humidity) or
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not is_nil(p.pressure) or
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not is_nil(p.wind_speed),
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limit: 1,
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select: true
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)
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Repo.exists?(query)
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end
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@doc """
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Get nearby stations using KNN (K-nearest neighbors) search.
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Uses the <-> operator for efficient spatial queries.
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"""
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@spec get_nearby_stations_knn(float(), float(), String.t() | nil, map()) :: [map()]
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def get_nearby_stations_knn(lat, lon, exclude_callsign \\ nil, opts \\ %{}) do
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limit = Map.get(opts, :limit, 10)
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hours_back = Map.get(opts, :hours_back, 1)
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cutoff_time = DateTime.add(DateTime.utc_now(), -hours_back * 3600, :second)
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# Build point for KNN search
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point = %Geo.Point{coordinates: {lon, lat}, srid: 4326}
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base_query =
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from(p in Packet,
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where: p.has_position == true,
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where: p.received_at >= ^cutoff_time,
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where: not is_nil(p.location),
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distinct: p.base_callsign,
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order_by: [
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asc: p.base_callsign,
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desc: p.received_at
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]
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)
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query =
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if exclude_callsign do
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from(p in base_query,
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where: p.sender != ^exclude_callsign
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)
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else
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base_query
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end
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# Subquery to get most recent packet per callsign, then order by distance
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subquery =
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from(p in subquery(query),
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order_by: fragment("? <-> ?", p.location, ^point),
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limit: ^limit,
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select: %{
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callsign: p.sender,
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base_callsign: p.base_callsign,
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lat: fragment("ST_Y(?)", p.location),
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lon: fragment("ST_X(?)", p.location),
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distance: fragment("ST_Distance(?::geography, ?::geography)", p.location, ^point),
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received_at: p.received_at,
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symbol_table_id: p.symbol_table_id,
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symbol_code: p.symbol_code,
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comment: p.comment
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}
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)
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Repo.all(subquery)
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end
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@doc """
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Get packet count for an area using prepared statement.
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"""
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@spec get_packet_count_in_area(list(), integer()) :: non_neg_integer()
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def get_packet_count_in_area([north, south, east, west], hours_back \\ 24) do
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time_ago = DateTime.add(DateTime.utc_now(), -hours_back * 3600, :second)
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query =
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from(p in Packet,
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where: p.has_position == true,
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where: p.received_at >= ^time_ago,
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where: fragment("ST_Y(?) BETWEEN ? AND ?", p.location, ^south, ^north),
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where: fragment("ST_X(?) BETWEEN ? AND ?", p.location, ^west, ^east),
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select: count(p.id)
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)
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Repo.one(query) || 0
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end
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end
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@ -22,6 +22,7 @@ defmodule AprsmeWeb.MapLive.Index do
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alias AprsmeWeb.MapLive.HistoricalLoader
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alias AprsmeWeb.MapLive.MapHelpers
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alias AprsmeWeb.MapLive.Navigation
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alias AprsmeWeb.MapLive.PacketBatcher
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alias AprsmeWeb.MapLive.PacketManager
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alias AprsmeWeb.MapLive.PacketProcessor
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alias AprsmeWeb.MapLive.RfPath
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@ -182,6 +183,9 @@ defmodule AprsmeWeb.MapLive.Index do
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Packets.get_latest_packet_for_callsign(tracked_callsign)
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end
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# Start packet batcher for efficient updates
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{:ok, batcher_pid} = PacketBatcher.start_link(self())
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assign(socket,
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map_ready: false,
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map_bounds: initial_bounds,
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@ -200,6 +204,7 @@ defmodule AprsmeWeb.MapLive.Index do
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map_page: true,
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packet_buffer: [],
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buffer_timer: nil,
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batcher_pid: batcher_pid,
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station_popup_open: false,
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initial_bounds_loaded: false,
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needs_initial_historical_load: tracked_callsign != "",
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@ -360,6 +365,15 @@ defmodule AprsmeWeb.MapLive.Index do
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def handle_event("marker_hover_start", %{"id" => _id, "path" => path, "lat" => lat, "lng" => lng}, socket) do
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require Logger
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# Cancel any pending hover end timer
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socket =
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if socket.assigns[:hover_end_timer] do
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Process.cancel_timer(socket.assigns.hover_end_timer)
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assign(socket, hover_end_timer: nil)
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else
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socket
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end
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# Validate coordinates first
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lat_float = ParamUtils.safe_parse_coordinate(lat, 0.0, -90.0, 90.0)
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lng_float = ParamUtils.safe_parse_coordinate(lng, 0.0, -180.0, 180.0)
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@ -390,8 +404,9 @@ defmodule AprsmeWeb.MapLive.Index do
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@impl true
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def handle_event("marker_hover_end", _params, socket) do
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# Clear the RF path lines
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{:noreply, push_event(socket, "clear_rf_path", %{})}
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# Debounce hover end to prevent flicker during rapid mouse movements
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timer = Process.send_after(self(), :clear_rf_path, 100)
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{:noreply, assign(socket, hover_end_timer: timer)}
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end
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@impl true
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@ -726,11 +741,56 @@ defmodule AprsmeWeb.MapLive.Index do
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def handle_info(:reload_historical_packets, socket), do: handle_reload_historical_packets(socket)
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def handle_info({:postgres_packet, packet}, socket), do: handle_info_postgres_packet(packet, socket)
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def handle_info({:postgres_packet, packet}, socket) do
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# Add packet to batcher instead of processing immediately
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if socket.assigns[:batcher_pid] do
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PacketBatcher.add_packet(socket.assigns.batcher_pid, packet)
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else
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handle_info_postgres_packet(packet, socket)
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end
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def handle_info({:spatial_packet, packet}, socket), do: handle_info_postgres_packet(packet, socket)
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{:noreply, socket}
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end
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def handle_info({:streaming_packet, packet}, socket), do: handle_info_postgres_packet(packet, socket)
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def handle_info({:spatial_packet, packet}, socket) do
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# Add packet to batcher instead of processing immediately
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if socket.assigns[:batcher_pid] do
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PacketBatcher.add_packet(socket.assigns.batcher_pid, packet)
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else
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handle_info_postgres_packet(packet, socket)
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end
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{:noreply, socket}
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end
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def handle_info({:streaming_packet, packet}, socket) do
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# Add packet to batcher instead of processing immediately
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if socket.assigns[:batcher_pid] do
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PacketBatcher.add_packet(socket.assigns.batcher_pid, packet)
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else
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handle_info_postgres_packet(packet, socket)
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end
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{:noreply, socket}
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end
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def handle_info({:packet_batch, packets}, socket) do
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# Process batch of packets efficiently
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socket =
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Enum.reduce(packets, socket, fn packet, acc_socket ->
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case handle_info_postgres_packet(packet, acc_socket) do
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{:noreply, new_socket} -> new_socket
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_ -> acc_socket
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end
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end)
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{:noreply, socket}
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end
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def handle_info(:clear_rf_path, socket) do
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# Clear the RF path lines with debouncing
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{:noreply, push_event(socket, "clear_rf_path", %{})}
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end
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def handle_info(
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%Broadcast{topic: "deployment_events", payload: {:new_deployment, %{deployed_at: deployed_at}}},
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@ -1708,17 +1768,31 @@ defmodule AprsmeWeb.MapLive.Index do
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end
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end
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# Configurable debounce delay (in milliseconds)
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@bounds_update_debounce_ms Application.compile_env(:aprsme, :bounds_update_debounce_ms, 400)
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defp schedule_bounds_update(map_bounds, socket) do
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# Cancel existing timer if present
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if socket.assigns[:bounds_update_timer] do
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Process.cancel_timer(socket.assigns.bounds_update_timer)
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case Process.cancel_timer(socket.assigns.bounds_update_timer) do
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false ->
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# Timer already fired, receive the message to clear it
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receive do
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{:process_bounds_update, _} -> :ok
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after
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0 -> :ok
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end
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_ ->
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:ok
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end
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end
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# Cancel any in-progress historical loading to prevent race conditions
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socket = HistoricalLoader.cancel_pending_loads(socket)
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# Increase debounce time slightly for better stability during rapid zooming
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timer_ref = Process.send_after(self(), {:process_bounds_update, map_bounds}, 400)
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# Use configurable debounce time for better stability during rapid zooming
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timer_ref = Process.send_after(self(), {:process_bounds_update, map_bounds}, @bounds_update_debounce_ms)
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socket = assign(socket, bounds_update_timer: timer_ref, pending_bounds: map_bounds)
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{:noreply, socket}
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end
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117
lib/aprsme_web/live/map_live/packet_batcher.ex
Normal file
117
lib/aprsme_web/live/map_live/packet_batcher.ex
Normal file
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@ -0,0 +1,117 @@
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defmodule AprsmeWeb.MapLive.PacketBatcher do
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@moduledoc """
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Batches incoming packets for efficient processing and rendering.
|
||||
Reduces the number of updates sent to the client by grouping packets.
|
||||
"""
|
||||
|
||||
use GenServer
|
||||
|
||||
require Logger
|
||||
|
||||
@batch_size 10
|
||||
# milliseconds
|
||||
@batch_timeout 100
|
||||
|
||||
defstruct [:parent_pid, :buffer, :timer_ref]
|
||||
|
||||
@doc """
|
||||
Start the packet batcher for a LiveView process.
|
||||
"""
|
||||
def start_link(parent_pid) do
|
||||
GenServer.start_link(__MODULE__, parent_pid)
|
||||
end
|
||||
|
||||
@doc """
|
||||
Add a packet to the batch queue.
|
||||
"""
|
||||
def add_packet(batcher_pid, packet) do
|
||||
GenServer.cast(batcher_pid, {:add_packet, packet})
|
||||
end
|
||||
|
||||
@doc """
|
||||
Force immediate processing of all buffered packets.
|
||||
"""
|
||||
def flush(batcher_pid) do
|
||||
GenServer.cast(batcher_pid, :flush)
|
||||
end
|
||||
|
||||
# GenServer callbacks
|
||||
|
||||
@impl true
|
||||
def init(parent_pid) do
|
||||
# Monitor parent LiveView process
|
||||
Process.monitor(parent_pid)
|
||||
|
||||
{:ok,
|
||||
%__MODULE__{
|
||||
parent_pid: parent_pid,
|
||||
buffer: [],
|
||||
timer_ref: nil
|
||||
}}
|
||||
end
|
||||
|
||||
@impl true
|
||||
def handle_cast({:add_packet, packet}, state) do
|
||||
# Add packet to buffer
|
||||
new_buffer = [packet | state.buffer]
|
||||
|
||||
# Cancel existing timer if any
|
||||
state = cancel_timer(state)
|
||||
|
||||
# Check if we should process immediately or wait
|
||||
if length(new_buffer) >= @batch_size do
|
||||
# Process immediately
|
||||
process_batch(new_buffer, state.parent_pid)
|
||||
{:noreply, %{state | buffer: [], timer_ref: nil}}
|
||||
else
|
||||
# Set timer for batch timeout
|
||||
timer_ref = Process.send_after(self(), :batch_timeout, @batch_timeout)
|
||||
{:noreply, %{state | buffer: new_buffer, timer_ref: timer_ref}}
|
||||
end
|
||||
end
|
||||
|
||||
@impl true
|
||||
def handle_cast(:flush, state) do
|
||||
state = cancel_timer(state)
|
||||
|
||||
if state.buffer != [] do
|
||||
process_batch(state.buffer, state.parent_pid)
|
||||
end
|
||||
|
||||
{:noreply, %{state | buffer: [], timer_ref: nil}}
|
||||
end
|
||||
|
||||
@impl true
|
||||
def handle_info(:batch_timeout, state) do
|
||||
if state.buffer != [] do
|
||||
process_batch(state.buffer, state.parent_pid)
|
||||
end
|
||||
|
||||
{:noreply, %{state | buffer: [], timer_ref: nil}}
|
||||
end
|
||||
|
||||
@impl true
|
||||
def handle_info({:DOWN, _ref, :process, pid, _reason}, state) when pid == state.parent_pid do
|
||||
# Parent LiveView process died, stop the batcher
|
||||
{:stop, :normal, state}
|
||||
end
|
||||
|
||||
# Private functions
|
||||
|
||||
defp cancel_timer(%{timer_ref: nil} = state), do: state
|
||||
|
||||
defp cancel_timer(%{timer_ref: ref} = state) do
|
||||
Process.cancel_timer(ref)
|
||||
%{state | timer_ref: nil}
|
||||
end
|
||||
|
||||
defp process_batch(packets, parent_pid) do
|
||||
# Reverse to maintain chronological order
|
||||
packets = Enum.reverse(packets)
|
||||
|
||||
# Send batch to parent LiveView
|
||||
send(parent_pid, {:packet_batch, packets})
|
||||
|
||||
Logger.debug("Processing batch of #{length(packets)} packets")
|
||||
end
|
||||
end
|
||||
1
mix.exs
1
mix.exs
|
|
@ -79,7 +79,6 @@ defmodule Aprsme.MixProject do
|
|||
{:phoenix_pubsub_redis, "~> 3.0"},
|
||||
{:postgrex, ">= 0.0.0"},
|
||||
{:swoosh, "~> 1.16"},
|
||||
# email service
|
||||
{:resend, "~> 0.4.1"},
|
||||
{:telemetry_metrics, "~> 1.0"},
|
||||
{:telemetry_poller, "~> 1.0"},
|
||||
|
|
|
|||
|
|
@ -0,0 +1,77 @@
|
|||
defmodule Aprsme.Repo.Migrations.OptimizePacketQueries do
|
||||
use Ecto.Migration
|
||||
|
||||
@disable_ddl_transaction true
|
||||
@disable_migration_lock true
|
||||
|
||||
def up do
|
||||
# Index for path pattern matching (used in heard_by queries)
|
||||
# Using btree with text_pattern_ops for LIKE queries since trigram might not be available
|
||||
execute """
|
||||
CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_packets_path_pattern
|
||||
ON packets(path text_pattern_ops)
|
||||
WHERE path IS NOT NULL AND path != ''
|
||||
"""
|
||||
|
||||
# Composite index for base_callsign lookups with time
|
||||
execute """
|
||||
CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_packets_base_callsign_time
|
||||
ON packets(base_callsign, received_at DESC)
|
||||
WHERE base_callsign IS NOT NULL
|
||||
"""
|
||||
|
||||
# Index for device_identifier lookups
|
||||
execute """
|
||||
CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_packets_device_identifier
|
||||
ON packets(device_identifier)
|
||||
WHERE device_identifier IS NOT NULL
|
||||
"""
|
||||
|
||||
# Partial index for recent packets (last 7 days) - very useful for most queries
|
||||
execute """
|
||||
CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_packets_recent_only
|
||||
ON packets(received_at DESC)
|
||||
WHERE received_at > NOW() - INTERVAL '7 days'
|
||||
"""
|
||||
|
||||
# Index for weather packet lookups by callsign
|
||||
execute """
|
||||
CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_packets_weather_by_callsign
|
||||
ON packets(sender, received_at DESC)
|
||||
WHERE (temperature IS NOT NULL
|
||||
OR humidity IS NOT NULL
|
||||
OR pressure IS NOT NULL
|
||||
OR wind_speed IS NOT NULL
|
||||
OR wind_direction IS NOT NULL
|
||||
OR rain_1h IS NOT NULL)
|
||||
"""
|
||||
|
||||
# Optimize existing indexes by updating statistics
|
||||
execute "ANALYZE packets"
|
||||
|
||||
# Increase statistics target for frequently queried columns
|
||||
execute "ALTER TABLE packets ALTER COLUMN sender SET STATISTICS 1000"
|
||||
execute "ALTER TABLE packets ALTER COLUMN received_at SET STATISTICS 1000"
|
||||
execute "ALTER TABLE packets ALTER COLUMN base_callsign SET STATISTICS 500"
|
||||
|
||||
# Create a compound index for the common "latest packet per callsign" query pattern
|
||||
execute """
|
||||
CREATE INDEX CONCURRENTLY IF NOT EXISTS idx_packets_sender_id_desc
|
||||
ON packets(sender, id DESC)
|
||||
"""
|
||||
end
|
||||
|
||||
def down do
|
||||
execute "DROP INDEX IF EXISTS idx_packets_path_pattern"
|
||||
execute "DROP INDEX IF EXISTS idx_packets_base_callsign_time"
|
||||
execute "DROP INDEX IF EXISTS idx_packets_device_identifier"
|
||||
execute "DROP INDEX IF EXISTS idx_packets_recent_only"
|
||||
execute "DROP INDEX IF EXISTS idx_packets_weather_by_callsign"
|
||||
execute "DROP INDEX IF EXISTS idx_packets_sender_id_desc"
|
||||
|
||||
# Reset statistics to default
|
||||
execute "ALTER TABLE packets ALTER COLUMN sender SET STATISTICS DEFAULT"
|
||||
execute "ALTER TABLE packets ALTER COLUMN received_at SET STATISTICS DEFAULT"
|
||||
execute "ALTER TABLE packets ALTER COLUMN base_callsign SET STATISTICS DEFAULT"
|
||||
end
|
||||
end
|
||||
Loading…
Add table
Reference in a new issue