added free-os-mem flag to contentserver

contentserver.go

@@ -4,7 +4,9 @@ import (
 	"flag"
 	"fmt"
 	"os"
+	"runtime/debug"
 	"strings"
+	"time"
 
 	"github.com/foomo/contentserver/metrics"
 	"github.com/foomo/contentserver/status"
@@ -32,6 +34,7 @@ var (
 	webserverAddress   = flag.String("webserver-address", "", "address to bind web server host:port, when empty no webserver will be spawned")
 	webserverPath      = flag.String("webserver-path", "/contentserver", "path to export the webserver on - useful when behind a proxy")
 	varDir             = flag.String("var-dir", "/var/lib/contentserver", "where to put my data")
+	flagFreeOSMem      = flag.Int("free-os-mem", 0, "free OS mem every X minutes")
 	logLevelOptions    = []string{
 		logLevelError,
 		logLevelRecord,
@@ -57,10 +60,22 @@ func exitUsage(code int) {
 
 func main() {
 	flag.Parse()
+
 	if *showVersionFlag {
 		fmt.Printf("%v\n", uniqushPushVersion)
 		return
 	}
+
+	if *flagFreeOSMem > 0 {
+		log.Notice("[INFO] freeing OS memory every ", *flagFreeOSMem, " minutes!")
+		go func() {
+			for _ = range time.After(time.Duration(*flagFreeOSMem) * time.Minute) {
+				log.Notice("FreeOSMemory")
+				debug.FreeOSMemory()
+			}
+		}()
+	}
+
 	if len(flag.Args()) == 1 {
 		fmt.Println(*address, flag.Arg(0))
 		level := log.LevelRecord