# slow memory leak **URL:** \ **Category:** Wowza Streaming Engine\ **Created:** [July 17, 2012, 10:14am UTC](https://community.wowza.com/t/slow-memory-leak/37498 "2012-07-17T10:14:12Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![Nicolas\_Vanhaute](https://avatars.discourse-cdn.com/v4/letter/n/a4c791/32.png) [@Nicolas\_Vanhaute](https://community.wowza.com/u/Nicolas_Vanhaute)\ **Post date:** [July 17, 2012, 10:14am UTC](https://community.wowza.com/t/slow-memory-leak/37498/1 "2012-07-17T10:14:12Z")
hi, I detected there is a slow memory leak of java when wowza is running when I stop wowza, no issue but when I start it and I let it up during one week, it increases slowly and never releases it any idea what’s the problem ? I use : Wowza Media Server 3 Perpetual Edition 3.1.2 build1624 Java Version: 1.7.0\_05 (64 bits) and I configured setenv.sh with : JAVA\_OPTS="-Xmx4000M" my server has : 4 vCPU 4 GB RAM Regards Nicolas ---
**Author:** ![Jason\_Hilton](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/jason_hilton/32/437_2.png) [@Jason\_Hilton](https://community.wowza.com/u/Jason_Hilton)\ **Post date:** [July 17, 2012, 9:56am UTC](https://community.wowza.com/t/slow-memory-leak/37498/2 "2012-07-17T09:56:52Z")
Hi Which GC are you using? Jason ---
**Author:** ![Richard\_Lanham](https://avatars.discourse-cdn.com/v4/letter/r/c68b51/32.png) [@Richard\_Lanham](https://community.wowza.com/u/Richard_Lanham)\ **Post date:** [July 18, 2012, 3:52pm UTC](https://community.wowza.com/t/slow-memory-leak/37498/3 "2012-07-18T15:52:28Z")
Nicolas, Take a look at the tuning guide [https://www.wowza.com/docs/how-to-do-performance-tuning](https://www.wowza.com/docs/how-to-do-performance-tuning) And take a look at JMX/JConsole [https://www.wowza.com/docs/quick-start-guides](https://www.wowza.com/docs/quick-start-guides) Use JConsole to monitor memory use in Wowza. Richard ---
**Author:** ![Randall\_Auriemma](https://avatars.discourse-cdn.com/v4/letter/r/85e7bf/32.png) [@Randall\_Auriemma](https://community.wowza.com/u/Randall_Auriemma)\ **Post date:** [July 17, 2012, 3:14am UTC](https://community.wowza.com/t/slow-memory-leak/37498/4 "2012-07-17T03:14:25Z")
Nicolas, Why do you think there is a memory leak? You’d need a good understanding of Jconsole and Java GC to identify such a thing. Java doesn’t necessarily lower committed memory after a GC run. ---
**Author:** ![Randall\_Auriemma](https://avatars.discourse-cdn.com/v4/letter/r/85e7bf/32.png) [@Randall\_Auriemma](https://community.wowza.com/u/Randall_Auriemma)\ **Post date:** [July 18, 2012, 7:44am UTC](https://community.wowza.com/t/slow-memory-leak/37498/5 "2012-07-18T07:44:56Z")
Look into these settings to understand how Java frees up allocated RAM: -XX:MaxHeapFreeRatio= -XX:MinHeapFreeRatio= You can lower your heap size if you’d like more RAM to be available: -Xmx2000M ---
**Author:** ![Nicolas\_Vanhaute](https://avatars.discourse-cdn.com/v4/letter/n/a4c791/32.png) [@Nicolas\_Vanhaute](https://community.wowza.com/u/Nicolas_Vanhaute)\ **Post date:** [July 18, 2012, 8:49am UTC](https://community.wowza.com/t/slow-memory-leak/37498/6 "2012-07-18T08:49:20Z")
> Nicolas, > > Why do you think there is a memory leak? You’d need a good understanding of Jconsole and Java GC to identify such a thing. Java doesn’t necessarily lower committed memory after a GC run. Hi Randall, I can see memory leak because each day when I do a “top”, I can see that java is using each day more and more memory. Sorry I’m not a java expert, so tell me how to know GC used ? And again, it’s just because of “top” command that I see this memory usage increases… if it’s normal, np, it was just a question 🙂 Regards Nicolas