From 0719638cc4f20f1a0c6559f70934b47cfe9202cb Mon Sep 17 00:00:00 2001
From: Liangjun Song <146005915+adai26@users.noreply.github.com>
Date: Mon, 29 Jul 2024 15:07:04 +0100
Subject: [PATCH] log clsi concurrency (#19651)

GitOrigin-RevId: 504f6f9cc3d4b7386dbcde86f76c1cf3a13e944f
---
 services/clsi/app/js/LockManager.js | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/services/clsi/app/js/LockManager.js b/services/clsi/app/js/LockManager.js
index 0ecd04356e..21abb43a2a 100644
--- a/services/clsi/app/js/LockManager.js
+++ b/services/clsi/app/js/LockManager.js
@@ -1,6 +1,7 @@
 const logger = require('@overleaf/logger')
 const Errors = require('./Errors')
 const RequestParser = require('./RequestParser')
+const Metrics = require('@overleaf/metrics')
 
 // The lock timeout should be higher than the maximum end-to-end compile time.
 // Here, we use the maximum compile timeout plus 2 minutes.
@@ -19,6 +20,8 @@ function acquire(key) {
     }
   }
 
+  Metrics.gauge('concurrent_compile_requests', LOCKS.size)
+
   const lock = new Lock(key)
   LOCKS.set(key, lock)
   return lock
@@ -39,6 +42,9 @@ class Lock {
     if (!lockWasActive) {
       logger.error({ key: this.key }, 'Lock was released twice')
     }
+    if (this.isExpired()) {
+      Metrics.inc('compile_lock_expired_before_release')
+    }
   }
 }