diff --git a/rust/prop_grid_rs/Cargo.lock b/rust/prop_grid_rs/Cargo.lock
index 812587c7..9555c179 100644
--- a/rust/prop_grid_rs/Cargo.lock
+++ b/rust/prop_grid_rs/Cargo.lock
@@ -1495,6 +1495,7 @@ dependencies = [
  "sqlx",
  "tempfile",
  "thiserror 2.0.18",
+ "tikv-jemallocator",
  "tokio",
  "tracing",
  "tracing-opentelemetry",
@@ -2384,6 +2385,26 @@ dependencies = [
  "cfg-if",
 ]
 
+[[package]]
+name = "tikv-jemalloc-sys"
+version = "0.6.1+5.3.0-1-ge13ca993e8ccb9ba9847cc330696e02839f328f7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cd8aa5b2ab86a2cefa406d889139c162cbb230092f7d1d7cbc1716405d852a3b"
+dependencies = [
+ "cc",
+ "libc",
+]
+
+[[package]]
+name = "tikv-jemallocator"
+version = "0.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0359b4327f954e0567e69fb191cf1436617748813819c94b8cd4a431422d053a"
+dependencies = [
+ "libc",
+ "tikv-jemalloc-sys",
+]
+
 [[package]]
 name = "tinystr"
 version = "0.8.3"
diff --git a/rust/prop_grid_rs/Cargo.toml b/rust/prop_grid_rs/Cargo.toml
index 8fb0229d..a8aa18b4 100644
--- a/rust/prop_grid_rs/Cargo.toml
+++ b/rust/prop_grid_rs/Cargo.toml
@@ -45,6 +45,16 @@ rmp-serde = "1.3"
 rmpv = { version = "1.3", features = ["with-serde"] }
 flate2 = "1"
 
+# glibc malloc retains most dirty pages after large transient
+# allocations, so RSS drifted from ~500 MiB at boot to ~1.5 GiB
+# after a few hourly f00 analysis cycles and tripped the 3 GiB
+# cgroup limit. jemalloc returns pages to the kernel on a short
+# decay schedule, so RSS follows actual working set and survives
+# the hourly peak (surface + pressure + native-duct blobs held
+# simultaneously during decode).
+[target.'cfg(not(target_env = "msvc"))'.dependencies]
+tikv-jemallocator = "0.6"
+
 [dev-dependencies]
 tokio = { version = "1", features = ["full", "test-util"] }
 pretty_assertions = "1"
diff --git a/rust/prop_grid_rs/src/lib.rs b/rust/prop_grid_rs/src/lib.rs
index 501f6463..1cfac736 100644
--- a/rust/prop_grid_rs/src/lib.rs
+++ b/rust/prop_grid_rs/src/lib.rs
@@ -19,6 +19,14 @@
 //! merge, no NEXRAD, no commercial-link boost. Those are f00-only in
 //! production and Elixir keeps handling f00.
 
+// jemalloc for all non-MSVC targets (Linux release builds land here).
+// Set as the global allocator at the library root so every binary in
+// the crate (worker, hrrr_point_worker) inherits it. See Cargo.toml
+// for the rationale behind switching off glibc malloc.
+#[cfg(not(target_env = "msvc"))]
+#[global_allocator]
+static GLOBAL: tikv_jemallocator::Jemalloc = tikv_jemallocator::Jemalloc;
+
 pub mod band_config;
 pub mod commercial;
 pub mod db;