# Memory increase over time

**URL:** <https://community.wowza.com/t/memory-increase-over-time/40993>\
**Category:** Wowza Streaming Engine\
**Created:** [January 22, 2014, 8:05am UTC](https://community.wowza.com/t/memory-increase-over-time/40993 "2014-01-22T08:05:48Z")\
**Posts on this page:** 11\
**Page:** 1

<div class="post-metadata">

**Author:** ![Jordan\_Rumph](https://avatars.discourse-cdn.com/v4/letter/j/3d9bf3/32.png) [@Jordan\_Rumph](https://community.wowza.com/u/Jordan_Rumph)\
**Post date:** [January 22, 2014, 8:05am UTC](https://community.wowza.com/t/memory-increase-over-time/40993/1 "2014-01-22T08:05:48Z")

</div>

We are trying to figure out why our Wowza servers memory usage increases until it finally maxes out.

Scenerio

======

We will eventually have nearly 1000 clients connecting to our 2, load balanced, Wowza servers for an IPTV setup that includes live streaming with DVR and vod capability. Right now, in testing, we don’t even have 50 clients connected at once.

Problem

======

After a few days, the Java heap size maxes out and the streams will start to occasionally skip. By monitoring JConsole, I noticed that the MemoryPool “CMS Old gen” gradually increases until ‘Committed Memory’ hits ‘Max’ (normally about 2 days), at which point all the other MemoryPools stop working correctly and we start to see errors with the streams (frames being dropped, stutter in video).

Setup

====

Encoders

* * *

(18) MakitoX2

(36) streams

Video Out: 720p

FPS: 60

GOP: 120

UDP Port: 10000-10500

Bitrate: 3000

Servers

* * *

Server: (2)HP DL380G8

CPU: (2)XeonE5(8core, 32 threads)

RAM: 32GB

NIC: (4)1Gb Bonded mode 6

Harddrive: (5)146GB 6G SAS 15k RPM RAID10

OS: Ubuntu 12.04.3

Java: jdk 1.7.0\_45

Wowza Media Server: 3.6.4

Wowza Settings

* * *

VHost.xml

```auto
<Root>
        <VHost>
                <HostPortList>
                        <HostPort>
                                <ProcessorCount>24</ProcessorCount>
                                <IpAddress>*</IpAddress>
                                <!-- Separate multiple ports with commas -->
                                <!-- 80: HTTP, RTMPT -->
                                <!-- 554: RTSP -->
                                <Port>1935</Port>
                                <HTTPIdent2Response></HTTPIdent2Response>
                                <SocketConfiguration>
                                        <ReuseAddress>true</ReuseAddress>
                                        <!-- suggested settings for video on demand applications -->
                                        <ReceiveBufferSize>65000</ReceiveBufferSize>
                                        <ReadBufferSize>65000</ReadBufferSize>
                                        <SendBufferSize>65000</SendBufferSize>
                                        <!-- suggest settings for low latency chat and video recording applications
                                        <ReceiveBufferSize>32000</ReceiveBufferSize>
                                        <ReadBufferSize>32000</ReadBufferSize>
                                        <SendBufferSize>32000</SendBufferSize>
                                        -->
                                        <KeepAlive>true</KeepAlive>
                                        <!-- <TrafficClass>0</TrafficClass> -->
                                        <!-- <OobInline>false</OobInline> -->
                                        <!-- <SoLingerTime>-1</SoLingerTime> -->
                                        <!-- <TcpNoDelay>false</TcpNoDelay> -->
                                        <AcceptorBackLog>100</AcceptorBackLog>
                                </SocketConfiguration>
                                <HTTPStreamerAdapterIDs>cupertinostreaming,smoothstreaming,sanjosestreaming,dvrchunkstreaming,mpegdashstreaming</HTTPStreamerAdapterIDs>
                                <HTTPProviders>
                                        <HTTPProvider>
                                                <BaseClass>com.wowza.wms.http.HTTPCrossdomain</BaseClass>
                                                <RequestFilters>*crossdomain.xml</RequestFilters>
                                                <AuthenticationMethod>none</AuthenticationMethod>
                                        </HTTPProvider>
                                        <HTTPProvider>
                                                <BaseClass>com.wowza.wms.http.HTTPClientAccessPolicy</BaseClass>
                                                <RequestFilters>*clientaccesspolicy.xml</RequestFilters>
                                                <AuthenticationMethod>none</AuthenticationMethod>
                                        </HTTPProvider>
                                        <HTTPProvider>
                                                <BaseClass>com.wowza.wms.http.HTTPProviderMediaList</BaseClass>
                                                <RequestFilters>*jwplayer.rss|*jwplayer.smil|*medialist.smil|*manifest-rtmp.f4m</RequestFilters>
                                                <AuthenticationMethod>none</AuthenticationMethod>
                                        </HTTPProvider>
                                        <!-- load balancer listener -->
                                        <HTTPProvider>
                                                <BaseClass>com.wowza.wms.plugin.loadbalancer.HTTPLoadBalancerRedirector</BaseClass>
                                                <RequestFilters>*loadbalancer</RequestFilters>
                                                <AuthenticationMethod>none</AuthenticationMethod>
                                                <Properties>
                                                        <Property>
                                                                <Name>enableServerInfoXML</Name>
                                                                <Value>true</Value>
                                                                <Type>Boolean</Type>
                                                        </Property>
                                                </Properties>
                                        </HTTPProvider>
                                        <HTTPProvider>
                                                <BaseClass>com.wowza.wms.http.HTTPServerVersion</BaseClass>
                                                <RequestFilters>*</RequestFilters>
                                                <AuthenticationMethod>none</AuthenticationMethod>
                                        </HTTPProvider>
                                </HTTPProviders>
                        </HostPort>
                        <!-- 443 with SSL -->
                        <!--
                        <HostPort>
                                <ProcessorCount>4</ProcessorCount>
                                <IpAddress>*</IpAddress>
                                <Port>443</Port>
                                <HTTPIdent2Response></HTTPIdent2Response>
                                <SSLConfig>
                                        <KeyStorePath>${com.wowza.wms.context.VHostConfigHome}/conf/keystore.jks</KeyStorePath>
                                        <KeyStorePassword>[password]</KeyStorePassword>
                                        <KeyStoreType>JKS</KeyStoreType>
                                        <SSLProtocol>TLS</SSLProtocol>
                                        <Algorithm>SunX509</Algorithm>
                                        <CipherSuites></CipherSuites>
                                        <Protocols></Protocols>
                                </SSLConfig>
                                <SocketConfiguration>
                                        <ReuseAddress>true</ReuseAddress>
                                        <ReceiveBufferSize>65000</ReceiveBufferSize>
                                        <ReadBufferSize>65000</ReadBufferSize>
                                        <SendBufferSize>65000</SendBufferSize>
                                        <KeepAlive>true</KeepAlive>
                                        <AcceptorBackLog>100</AcceptorBackLog>
                                </SocketConfiguration>
                                <HTTPStreamerAdapterIDs>cupertinostreaming,smoothstreaming,sanjosestreaming,dvrchunkstreaming,mpegdashstreaming</HTTPStreamerAdapterIDs>
                                <HTTPProviders>
                                        <HTTPProvider>
                                                <BaseClass>com.wowza.wms.http.HTTPCrossdomain</BaseClass>
                                                <RequestFilters>*crossdomain.xml</RequestFilters>
                                                <AuthenticationMethod>none</AuthenticationMethod>
                                        </HTTPProvider>
                                        <HTTPProvider>
                                                <BaseClass>com.wowza.wms.http.HTTPClientAccessPolicy</BaseClass>
                                                <RequestFilters>*clientaccesspolicy.xml</RequestFilters>
                                                <AuthenticationMethod>none</AuthenticationMethod>
                                        </HTTPProvider>
                                        <HTTPProvider>
                                                <BaseClass>com.wowza.wms.http.HTTPProviderMediaList</BaseClass>
                                                <RequestFilters>*jwplayer.rss|*jwplayer.smil|*medialist.smil|*manifest-rtmp.f4m</RequestFilters>
                                                <AuthenticationMethod>none</AuthenticationMethod>
                                        </HTTPProvider>
                                        <HTTPProvider>
                                                <BaseClass>com.wowza.wms.http.HTTPServerVersion</BaseClass>
                                                <RequestFilters>*</RequestFilters>
                                                <AuthenticationMethod>none</AuthenticationMethod>
                                        </HTTPProvider>
                                </HTTPProviders>
                        </HostPort>
                        -->
                        <!-- Admin HostPort -->
                        <HostPort>
                                <ProcessorCount>1</ProcessorCount>
                                <IpAddress>*</IpAddress>
                                <Port>8086</Port>
                                <HTTPIdent2Response></HTTPIdent2Response>
                                <SocketConfiguration>
                                        <ReuseAddress>true</ReuseAddress>
                                        <ReceiveBufferSize>16000</ReceiveBufferSize>
                                        <ReadBufferSize>16000</ReadBufferSize>
                                        <SendBufferSize>16000</SendBufferSize>
                                        <KeepAlive>true</KeepAlive>
                                        <AcceptorBackLog>100</AcceptorBackLog>
                                </SocketConfiguration>
                                <HTTPStreamerAdapterIDs></HTTPStreamerAdapterIDs>
                                <HTTPProviders>
                                        <HTTPProvider>
                                                <BaseClass>com.wowza.wms.http.streammanager.HTTPStreamManager</BaseClass>
                                                <RequestFilters>streammanager*</RequestFilters>
                                                <AuthenticationMethod>admin-digest</AuthenticationMethod>
                                        </HTTPProvider>
                                        <HTTPProvider>
                                                <BaseClass>com.wowza.wms.http.HTTPServerInfoXML</BaseClass>
                                                <RequestFilters>serverinfo*</RequestFilters>
                                                <AuthenticationMethod>admin-digest</AuthenticationMethod>
                                        </HTTPProvider>
                                        <HTTPProvider>
                                                <BaseClass>com.wowza.wms.http.HTTPConnectionInfo</BaseClass>
                                                <RequestFilters>connectioninfo*</RequestFilters>
                                                <AuthenticationMethod>admin-digest</AuthenticationMethod>
                                        </HTTPProvider>
                                        <HTTPProvider>
                                                <BaseClass>com.wowza.wms.http.HTTPConnectionCountsXML</BaseClass>
                                                <RequestFilters>connectioncounts*</RequestFilters>
                                                <AuthenticationMethod>admin-digest</AuthenticationMethod>
                                        </HTTPProvider>
                                        <HTTPProvider>
                                                <BaseClass>com.wowza.wms.transcoder.httpprovider.HTTPTranscoderThumbnail</BaseClass>
                                                <RequestFilters>transcoderthumbnail*</RequestFilters>
                                                <AuthenticationMethod>admin-digest</AuthenticationMethod>
                                        </HTTPProvider>
                                        <HTTPProvider>
                                                <BaseClass>com.wowza.wms.http.HTTPProviderMediaList</BaseClass>
                                                <RequestFilters>medialist*</RequestFilters>
                                                <AuthenticationMethod>admin-digest</AuthenticationMethod>
                                        </HTTPProvider>
                                        <HTTPProvider>
                                                <BaseClass>com.wowza.wms.livestreamrecord.http.HTTPLiveStreamRecord</BaseClass>
                                                <RequestFilters>livestreamrecord*</RequestFilters>
                                                <AuthenticationMethod>admin-digest</AuthenticationMethod>
                                        </HTTPProvider>
                                        <HTTPProvider>
                                                <BaseClass>com.wowza.wms.http.HTTPServerVersion</BaseClass>
                                                <RequestFilters>*</RequestFilters>
                                                <AuthenticationMethod>none</AuthenticationMethod>
                                        </HTTPProvider>
                                </HTTPProviders>
                        </HostPort>
                </HostPortList>
                <HTTPStreamerAdapters>
                        <HTTPStreamerAdapter>
                                <ID>smoothstreaming</ID>
                                <Name>smoothstreaming</Name>
                                <Properties>
                                </Properties>
                        </HTTPStreamerAdapter>
                        <HTTPStreamerAdapter>
                                <ID>cupertinostreaming</ID>
                                <Name>cupertinostreaming</Name>
                                <Properties>
                                </Properties>
                        </HTTPStreamerAdapter>
                        <HTTPStreamerAdapter>
                                <ID>sanjosestreaming</ID>
                                <Name>sanjosestreaming</Name>
                                <Properties>
                                </Properties>
                        </HTTPStreamerAdapter>
                        <HTTPStreamerAdapter>
                                <ID>dvrchunkstreaming</ID>
                                <Name>dvrchunkstreaming</Name>
                                <Properties>
                                </Properties>
                        </HTTPStreamerAdapter>
                        <HTTPStreamerAdapter>
                                <ID>mpegdashstreaming</ID>
                                <Name>mpegdashstreaming</Name>
                                <Properties>
                                </Properties>
                        </HTTPStreamerAdapter>
                </HTTPStreamerAdapters>
                <HandlerThreadPool>
                        <PoolSize>480</PoolSize>
                </HandlerThreadPool>
                <TransportThreadPool>
                        <PoolSize>320</PoolSize>
                </TransportThreadPool>
                <IdleWorkers>
                        <WorkerCount>24</WorkerCount>
                        <CheckFrequency>100</CheckFrequency>
                        <MinimumWaitTime>5</MinimumWaitTime>
                </IdleWorkers>
                <NetConnections>
                        <ProcessorCount>24</ProcessorCount>
                        <IdleFrequency>250</IdleFrequency>
                        <SocketConfiguration>
                                <ReuseAddress>true</ReuseAddress>
                                <ReceiveBufferSize>65000</ReceiveBufferSize>
                                <ReadBufferSize>65000</ReadBufferSize>
                                <SendBufferSize>65000</SendBufferSize>
                                <KeepAlive>true</KeepAlive>
                                <!-- <TrafficClass>0</TrafficClass> -->
                                <!-- <OobInline>false</OobInline> -->
                                <!-- <SoLingerTime>-1</SoLingerTime> -->
                                <!-- <TcpNoDelay>false</TcpNoDelay> -->
                                <AcceptorBackLog>100</AcceptorBackLog>
                        </SocketConfiguration>
                </NetConnections>
                <HTTPTunnel>
                        <KeepAliveTimeout>2000</KeepAliveTimeout>
                </HTTPTunnel>
                <Client>
                        <ClientTimeout>90000</ClientTimeout>
                        <IdleFrequency>500</IdleFrequency>
                </Client>
                <!-- RTP/Authentication/Methods defined in Authentication.xml. Default setup includes; none, basic, digest -->
                <RTP>
                        <IdleFrequency>75</IdleFrequency>
                        <DatagramConfiguration>
                                <Incoming>
                                        <ReuseAddress>true</ReuseAddress>
                                        <ReceiveBufferSize>1024000</ReceiveBufferSize>
                                        <SendBufferSize>65000</SendBufferSize>
                                        <!-- <MulticastBindToAddress>true</MulticastBindToAddress> -->
                                        <!-- <MulticastInterfaceAddress>192.168.1.22</MulticastInterfaceAddress> -->
                                        <!-- <TrafficClass>0</TrafficClass> -->
                                        <MulticastTimeout>50</MulticastTimeout>
                                        <DatagramMaximumPacketSize>4096</DatagramMaximumPacketSize>
                                </Incoming>
                                <Outgoing>
                                        <ReuseAddress>true</ReuseAddress>
                                        <ReceiveBufferSize>65000</ReceiveBufferSize>
                                        <SendBufferSize>65000</SendBufferSize>
                                        <!-- <MulticastBindToAddress>true</MulticastBindToAddress> -->
                                        <!-- <MulticastInterfaceAddress>192.168.1.22</MulticastInterfaceAddress> -->
                                        <!-- <TrafficClass>0</TrafficClass> -->
                                        <MulticastTimeout>50</MulticastTimeout>
                                        <DatagramMaximumPacketSize>4096</DatagramMaximumPacketSize>
                                </Outgoing>
                        </DatagramConfiguration>
                        <UnicastIncoming>
                                <ProcessorCount>12</ProcessorCount>
                        </UnicastIncoming>
                        <UnicastOutgoing>
                                <ProcessorCount>24</ProcessorCount>
                        </UnicastOutgoing>
                        <MulticastIncoming>
                                <ProcessorCount>12</ProcessorCount>
                        </MulticastIncoming>
                        <MulticastOutgoing>
                                <ProcessorCount>12</ProcessorCount>
                        </MulticastOutgoing>
                </RTP>
                <Application>
                        <ApplicationTimeout>60000</ApplicationTimeout>
                        <PingTimeout>12000</PingTimeout>
                        <UnidentifiedSessionTimeout>30000</UnidentifiedSessionTimeout>
                        <ValidationFrequency>20000</ValidationFrequency>
                        <MaximumPendingWriteBytes>0</MaximumPendingWriteBytes>
                        <MaximumSetBufferTime>60000</MaximumSetBufferTime>
                </Application>
                <StartStartupStreams>true</StartStartupStreams>
                <!-- Properties defined here will be added to the IVHost.getProperties() collection -->
                <Properties>
                </Properties>
        </VHost>
</Root>

```

bin/setenv.sh

```auto
#!/bin/sh
_EXECJAVA=java
# Run server environment
JAVA_OPTS="$JAVA_OPTS -server"
# Max heap size (-Xmx<max> -Xms<min>)
JAVA_OPTS="$JAVA_OPTS -Xmx10000M"
# Custom garbage collection
#JAVA_OPTS="$JAVA_OPTS -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:NewRatio=3" 
# Better garbage collection setting to avoid long pauses
JAVA_OPTS="$JAVA_OPTS -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:NewSize=512m"
# Uncomment to log debug garbage collection information
NOW=$(date +"%Y-%m-%d-%H-%M")
JAVA_OPTS="$JAVA_OPTS -verbose:gc -Xloggc:"/var/log/wowza/gc_$NOW.log" -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+PrintHeapAtGC -XX:+PrintGCApplicationConcurrentTime -XX:+PrintGCApplicationStoppedTime"
# Uncomment to write heap dump on OutOfMemoryError
#JAVA_OPTS="$JAVA_OPTS -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/usr/local/WowzaMediaServer"
# Uncomment to force Java to use specific language settings
#JAVA_OPTS="$JAVA_OPTS -Duser.language=en -Duser.country=US -Dfile.encoding=Cp1252"
# Uncomment to fix multicast crosstalk problem when streams share multicast port
JAVA_OPTS="$JAVA_OPTS -Djava.net.preferIPv4Stack=true"
WMSAPP_HOME=/usr/local/WowzaMediaServer
WMSCONFIG_HOME=/usr/local/WowzaMediaServer
WMSCONFIG_URL=
export WMSAPP_HOME WMSCONFIG_HOME JAVA_OPTS _EXECJAVA

```

Applications

* * *

vod

liveorigin

liveedge

What we have tried

==================

We have tuned the server as recommended here;

> **[Tune Wowza Streaming Engine for performance](https://www.wowza.com/docs/tune-wowza-streaming-engine-for-optimal-performance)**
>
> Optimize Java, thread pool, Media Cache, and virtual host performance settings in Wowza Streaming Engine.

We have looked through everything we could find on tuning in the forums and have tried many different ways for GC in setenv.sh. Here are some posts that we looked into:

> [@Performance issues on a local LAN](http://community.wowza.com/t/-/37175):
>
> We’re trying to track down a performance problem and isolate where it would be coming from. Here is the scenario: Wowza is a 4 core Windows box and has 8GB of RAM. We have followed all the steps in the performance tuning guide No firewalls involved for this test as it is all LAN to LAN on the same subnet Wowza Java heap size is set to 5000 Wowza has the -server option enabled Java JDE version is 1.7.0\_01 We do not have garbage collection enabled The Wowza application I’m …

[https://www.wowza.com/forums/showthread.php?24647-Best-Tunning-Help-Request](https://www.wowza.com/forums/showthread.php?24647-Best-Tunning-Help-Request)

> [@Wowza memory RAM consumption increasing on](http://community.wowza.com/t/-/35735):
>
> Hello, Please someone help me. I’ve opened a support ticket, but I have some urgency. I have a server running only Vod Streaming applications and the use of memory ram of this server 5 days ago began to increase and almost crashed the server twice, making me have to restart the wowza to prevent it. I made no changes to the configuration, that was functioning normally. A client of mine, who uses the protocol RTMPS, was having many claims saying that after 3 seeks the video stops. I did some res…

On some of the posts, users were experiancing similar issues but it was resolved with upgrading Wowza. We have done that, however, and are still getting the memory increase.

If you have any ideas or suggestions on how we can resolve this, it would be very helpful. We have a huge deployment coming up that will include 6 more servers with nearly the exact same setup. I need to get these 2 working first so that we have an idea of how to deploy the rest. Thanks!

---

<div class="post-metadata">

**Author:** ![Jordan\_Rumph](https://avatars.discourse-cdn.com/v4/letter/j/3d9bf3/32.png) [@Jordan\_Rumph](https://community.wowza.com/u/Jordan_Rumph)\
**Post date:** [January 22, 2014, 8:50am UTC](https://community.wowza.com/t/memory-increase-over-time/40993/2 "2014-01-22T08:50:11Z")

</div>

Update. I just realized that the VHost.xml file wasn’t tuned. I had done it and double checked in the past, but I might have lost it during an upgrade. I will monitor with the new changes and post results. That’s probably it =(.

---

<div class="post-metadata">

**Author:** ![Daren\_Johnson](https://avatars.discourse-cdn.com/v4/letter/d/ee59a6/32.png) [@Daren\_Johnson](https://community.wowza.com/u/Daren_Johnson)\
**Post date:** [June 15, 2014, 8:57pm UTC](https://community.wowza.com/t/memory-increase-over-time/40993/3 "2014-06-15T20:57:10Z")

</div>

Hi,

In the above case improvement was seen by using the G1 (Garbage first) collector.

It’s certainly worth a try, and may help if you’re seeing exactly the same issue.

Daren

---

<div class="post-metadata">

**Author:** ![sal\_jefferson](https://avatars.discourse-cdn.com/v4/letter/s/6de8d8/32.png) [@sal\_jefferson](https://community.wowza.com/u/sal_jefferson)\
**Post date:** [January 27, 2014, 8:01am UTC](https://community.wowza.com/t/memory-increase-over-time/40993/4 "2014-01-27T08:01:46Z")

</div>

Please zip up your /conf and /logs folders and send them to support@wowza.com to open a ticket.

Please also include a link to this thread as reference.

Salvadore

---

<div class="post-metadata">

**Author:** ![Jordan\_Rumph](https://avatars.discourse-cdn.com/v4/letter/j/3d9bf3/32.png) [@Jordan\_Rumph](https://community.wowza.com/u/Jordan_Rumph)\
**Post date:** [January 27, 2014, 5:55am UTC](https://community.wowza.com/t/memory-increase-over-time/40993/5 "2014-01-27T05:55:16Z")

</div>

I have verified the servers are properly tuned but we are still getting the same result. I updated my original post to show what the current tuning is. Any ideas as to why the memory increases?

I have noticed more specifically what happens with the garbage collection. It seems that the “Par Eden space” clears out completely when it does it’s GC. The graph over time is exactly the same. It’s “CMS Old Gen” that slowly builds up. When it hits it’s ceiling, the “Par Eden Space” and the “Par survivor space” max out as well and we notice video errors. It seems that the big GC that is supposed to clean out “CMS Old Gen” can’t get it all in the time alloted, or can’t clear it all for some other reason.

Thanks for your help!

---

<div class="post-metadata">

**Author:** ![Jordan\_Rumph](https://avatars.discourse-cdn.com/v4/letter/j/3d9bf3/32.png) [@Jordan\_Rumph](https://community.wowza.com/u/Jordan_Rumph)\
**Post date:** [January 27, 2014, 6:46am UTC](https://community.wowza.com/t/memory-increase-over-time/40993/6 "2014-01-27T06:46:06Z")

</div>

Ok sent. Let me know if you need anything else. Thanks Salvadore!

Jordan

---

<div class="post-metadata">

**Author:** ![Jordan\_Rumph](https://avatars.discourse-cdn.com/v4/letter/j/3d9bf3/32.png) [@Jordan\_Rumph](https://community.wowza.com/u/Jordan_Rumph)\
**Post date:** [October 23, 2014, 5:29am UTC](https://community.wowza.com/t/memory-increase-over-time/40993/7 "2014-10-23T05:29:08Z")

</div>

Hi everyone,

Just a quick update. We have been running these tuned settings for about 9 months now with complete stability. Here is our GC:

bin/setenv.sh

```auto
#!/bin/sh
_EXECJAVA=java
# Run server environment
JAVA_OPTS="$JAVA_OPTS -server"
# Max heap size (-Xmx<max> -Xms<min>)
JAVA_OPTS="$JAVA_OPTS -Xmx10000M -Xms10000M"
# G1GC settings
JAVA_OPTS="$JAVA_OPTS -XX:+UseG1GC -XX:MaxGCPauseMillis=100 -XX:InitiatingHeapOccupancyPercent=45"
# Better garbage collection setting to avoid long pauses
#JAVA_OPTS="$JAVA_OPTS -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:NewSize=512m"
# Uncomment to log debug G1GC information
#NOW=$(date +"%Y-%m-%d-%H-%M")
#JAVA_OPTS="$JAVA_OPTS -Xloggc:"/var/log/wowza/gc_$NOW.log" -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+PrintGCDateStamps"
# Uncomment to log debug garbage collection information
#NOW=$(date +"%Y-%m-%d-%H-%M")
#JAVA_OPTS="$JAVA_OPTS -verbose:gc -Xloggc:"/var/log/wowza/gc_$NOW.log" -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+PrintHeapAtGC -XX:+PrintGCApplicationConcurrentTime -XX:+PrintGCApplicationStoppedTime"
# Uncomment to write heap dump on OutOfMemoryError
#JAVA_OPTS="$JAVA_OPTS -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/usr/local/WowzaMediaServer"
# Uncomment to force Java to use specific language settings
#JAVA_OPTS="$JAVA_OPTS -Duser.language=en -Duser.country=US -Dfile.encoding=Cp1252"
# Uncomment to fix multicast crosstalk problem when streams share multicast port
JAVA_OPTS="$JAVA_OPTS -Djava.net.preferIPv4Stack=true"
WMSAPP_HOME=/usr/local/WowzaMediaServer
WMSCONFIG_HOME=/usr/local/WowzaMediaServer
WMSCONFIG_URL=
export WMSAPP_HOME WMSCONFIG_HOME JAVA_OPTS _EXECJAVA

```

Hope that helps!

Jordan

---

<div class="post-metadata">

**Author:** ![Jordan\_Rumph](https://avatars.discourse-cdn.com/v4/letter/j/3d9bf3/32.png) [@Jordan\_Rumph](https://community.wowza.com/u/Jordan_Rumph)\
**Post date:** [December 3, 2014, 5:53am UTC](https://community.wowza.com/t/memory-increase-over-time/40993/8 "2014-12-03T05:53:54Z")

</div>

Hi cymaknova,

You’re right, that was for Wowza 3. We recently migrated to Wowza 4, and after a LOT of load testing, we find that the default GC, CMS, works best for us. I’m not sure if our load testing just got better or there was a change to Wowza 4 tuning, but G1GC won’t last as long as CMS.

One thing you can check is the GC logs that are enabled in ‘conf/Tune.xml’. You’ll need to educate yourself on how to read them, but a quick google search of ‘reading gc logs’ will give you lots of places to start. A site I found that had a lot of good articles is:

[https://blogs.oracle.com/poonam/](https://blogs.oracle.com/poonam/)

Once you learn how to read the GC logs, you can see what’s going on. Hope that helps!

Jordan

---

<div class="post-metadata">

**Author:** ![Craig\_Tarr](https://avatars.discourse-cdn.com/v4/letter/c/ecc23a/32.png) [@Craig\_Tarr](https://community.wowza.com/u/Craig_Tarr)\
**Post date:** [June 14, 2014, 3:50pm UTC](https://community.wowza.com/t/memory-increase-over-time/40993/9 "2014-06-14T15:50:52Z")

</div>

_bump_

Any update? I am seeing similar trends on my wowza install where over 2-3 day the memory is filled up and our streams become unstable and jittery.

---

<div class="post-metadata">

**Author:** ![Jeffery\_Mak](https://avatars.discourse-cdn.com/v4/letter/j/7c8e57/32.png) [@Jeffery\_Mak](https://community.wowza.com/u/Jeffery_Mak)\
**Post date:** [November 20, 2014, 4:01pm UTC](https://community.wowza.com/t/memory-increase-over-time/40993/10 "2014-11-20T16:01:50Z")

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> Hi everyone,
> 
> Just a quick update. We have been running these tuned settings for about 9 months now with complete stability. Here is our GC:
> 
> bin/setenv.sh
> 
> ```auto
> #!/bin/sh
> _EXECJAVA=java
> # Run server environment
> JAVA_OPTS="$JAVA_OPTS -server"
> # Max heap size (-Xmx<max> -Xms<min>)
> JAVA_OPTS="$JAVA_OPTS -Xmx10000M -Xms10000M"
> # G1GC settings
> JAVA_OPTS="$JAVA_OPTS -XX:+UseG1GC -XX:MaxGCPauseMillis=100 -XX:InitiatingHeapOccupancyPercent=45"
> # Better garbage collection setting to avoid long pauses
> #JAVA_OPTS="$JAVA_OPTS -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:NewSize=512m"
> # Uncomment to log debug G1GC information
> #NOW=$(date +"%Y-%m-%d-%H-%M")
> #JAVA_OPTS="$JAVA_OPTS -Xloggc:"/var/log/wowza/gc_$NOW.log" -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+PrintGCDateStamps"
> # Uncomment to log debug garbage collection information
> #NOW=$(date +"%Y-%m-%d-%H-%M")
> #JAVA_OPTS="$JAVA_OPTS -verbose:gc -Xloggc:"/var/log/wowza/gc_$NOW.log" -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+PrintHeapAtGC -XX:+PrintGCApplicationConcurrentTime -XX:+PrintGCApplicationStoppedTime"
> # Uncomment to write heap dump on OutOfMemoryError
> #JAVA_OPTS="$JAVA_OPTS -XX:+HeapDumpOnOutOfMemoryError -XX:HeapDumpPath=/usr/local/WowzaMediaServer"
> # Uncomment to force Java to use specific language settings
> #JAVA_OPTS="$JAVA_OPTS -Duser.language=en -Duser.country=US -Dfile.encoding=Cp1252"
> # Uncomment to fix multicast crosstalk problem when streams share multicast port
> JAVA_OPTS="$JAVA_OPTS -Djava.net.preferIPv4Stack=true"
> WMSAPP_HOME=/usr/local/WowzaMediaServer
> WMSCONFIG_HOME=/usr/local/WowzaMediaServer
> WMSCONFIG_URL=
> export WMSAPP_HOME WMSCONFIG_HOME JAVA_OPTS _EXECJAVA
> 
> ```
> 
> Hope that helps!
> 
> Jordan

I assume this is version 3.x. How about for Streaming Engine v4.x? I have the same problem with memory usage.

I stream a live stream to the server and have the transcoder on. The server record all incoming stream and then send that to my S3 bucket. My memory get close to 80% by the time I finished a 2hr session live streaming and recording. I am using an amazon EC2 instance c3.xlarge. I know it is at the low end, but the memory usage is way too high and I want to find out why and how could I fix it.

Thanks!

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<div class="post-metadata">

**Author:** ![Bob\_Bohanek](https://avatars.discourse-cdn.com/v4/letter/b/ecb155/32.png) [@Bob\_Bohanek](https://community.wowza.com/u/Bob_Bohanek)\
**Post date:** [March 20, 2015, 1:59pm UTC](https://community.wowza.com/t/memory-increase-over-time/40993/11 "2015-03-20T13:59:12Z")

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> I assume this is version 3.x. How about for Streaming Engine v4.x? I have the same problem with memory usage.
> 
> I stream a live stream to the server and have the transcoder on. The server record all incoming stream and then send that to my S3 bucket. My memory get close to 80% by the time I finished a 2hr session live streaming and recording. I am using an amazon EC2 instance c3.xlarge. I know it is at the low end, but the memory usage is way too high and I want to find out why and how could I fix it.
> 
> Thanks!

cymankova,

Did you ever get to a resolution on this. I am currently working with Wowza support on a similar issue and wondering what steps you took. Our servers are based at Rackspace, but have experienced ever increasing memory utilization over time. We were running on 4.0.6, and saw problems in both Total Memory and Wowza Heap (both in the red). Updating to 4.1.2 took care of the heap but Total Memory creeped up over time.

Thanks,

Bob