#2501 low memory environment option via PM2_OPTIMIZE_MEMORY

Unitech · Jul 4, 2017 · 34d13dc · 34d13dc
1 parent b0fd46c
commit 34d13dc
Show file tree

Hide file tree

Showing 3 changed files with 9 additions and 2 deletions.
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -5,6 +5,7 @@
 - #2997 --disable-logs option to suppress error
 - #2290 allow to declare apps under "pm2" attribute (eq "apps"). Nicer in package.json
 - pm2 install module-name --uid <uid> --gid <gid> possible
+- #2501 low memory environment pm2 setting via PM2_OPTIMIZE_MEMORY (beta)
 - #2968 pm2 attach <pm_id> to attach to process stdin / stdout
 - pm2-runtime -> drop in replacement for the node.js binary
 - #2951 pm2 reload command locker via timestamped lock file

diff --git a/constants.js b/constants.js
@@ -52,6 +52,8 @@ var csts = {
   CLUSTER_MODE_ID         : 'cluster_mode',
   FORK_MODE_ID            : 'fork_mode',
 
+  LOW_MEMORY_ENVIRONMENT  : process.env.PM2_OPTIMIZE_MEMORY || false,
+
   KEYMETRICS_ROOT_URL     : process.env.KEYMETRICS_NODE || 'root.keymetrics.io',
   KEYMETRICS_BANNER       : '../lib/keymetrics',
   DEFAULT_MODULE_JSON     : 'package.json',

diff --git a/lib/Client.js b/lib/Client.js
@@ -208,10 +208,14 @@ Client.prototype.launchDaemon = function(opts, cb) {
     err = fs.openSync(that.conf.PM2_LOG_FILE_PATH, 'a');
   }
 
+  if (this.conf.LOW_MEMORY_ENVIRONMENT) {
+    var os = require('os');
+    node_args.push('--gc-global'); // Does full GC (smaller memory footprint)
+    node_args.push('--max-old-space-size=' + Math.floor(os.totalmem() / 1024 / 1024));
+  }
+
   // Node.js tuning for better performance
   //node_args.push('--expose-gc'); // Allows manual GC in the code
-  //node_args.push('--gc-global'); // Does full GC (smaller memory footprint)
-  //node_args.push('--max-old-space-size=100');
 
   /**
    * Add node [arguments] depending on PM2_NODE_OPTIONS env variable