Explicitly try and hand RAM back to the OS

As part of the GC cycle, try and give RAM back to the OS.
m-lab · Dec 9, 2019 · 921c5f7 · 921c5f7
1 parent 315acc9
commit 921c5f7
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/demuxer/tcp.go b/demuxer/tcp.go
@@ -3,6 +3,7 @@ package demuxer
 
 import (
 	"context"
+	"runtime/debug"
 	"time"
 
 	"github.com/google/gopacket"
@@ -111,6 +112,8 @@ func (d *TCP) collectGarbage() {
 			close(s.UUIDchan)
 			close(s.Pchan)
 		}
+		// Tell the VM to try and return RAM to the OS.
+		debug.FreeOSMemory()
 	}(d.oldFlows)
 	// Record GC data.
 	d.status.GC(len(d.currentFlows), len(d.oldFlows))