Reuse reset MySQL connections per worker

2026-07-16 17:00:28 +00:00
parent b04ce3d005
commit 6a02c07bcb
11 changed files with 185 additions and 10 deletions
@@ -192,6 +192,7 @@ WASM_CORE_PATH=<UCE_REPO_ROOT>/bin/wasm/core.wasm
 WASM_MEMORY_LIMIT_BYTES=536870912
 WASM_EPOCH_DEADLINE_TICKS=200
 WASM_EPOCH_PERIOD_MS=50
+MYSQL_PERSISTENT_POOL_SIZE=8

 WORKER_COUNT=4
 MAX_MEMORY=16777216
@@ -211,6 +212,7 @@ Important settings:
 - `BIN_DIRECTORY` stores generated C++, wasm artifacts, compile output, and runtime caches.
 - `TMP_UPLOAD_PATH` and `SESSION_PATH` must be writable by the runtime.
 - `SESSION_COOKIE_SECURE=1` adds the `Secure` attribute to UCE-managed session cookies and should be used for HTTPS-only deployments. Leave it `0` only for local/plain-HTTP development.
+- `MYSQL_PERSISTENT_POOL_SIZE` caps credential-keyed connections retained by each Wasm worker. The default `8` is clamped to `64`; set it to `0` to restore request-lifetime connections. Cached sessions are reset before reuse.
 - `HTTP_PORT` is the built-in HTTP/WebSocket listener used for WebSocket upgrade traffic and direct local probes. Bind/firewall it for local access only; nginx/Apache should be the public entry point.
 - `WS_BROKER_OUTBOUND_TIMEOUT_SECONDS` controls how long a forwarded WS message can remain queued in the broker before being dropped (default `30`). Set to `0` to disable the timeout.
 - `WASM_COMPILE_SCRIPT` must point to `scripts/compile_wasm_unit` unless you provide an equivalent compiler. Relative paths are resolved from the runtime root/`COMPILER_SYS_PATH`. That script calls `scripts/check_unit_wasm.py` after linking each unit and uses the pinned WASI SDK on every deployment host.