How to increase JVM Memory for SOLR on Windows?

tkiernanIFRS 2018-01-10 09:32:02 UTC #1

Keywords:SOLR - Windows - How to - Other
Description:
The solution we have has hit a size where we've started to see the service drop out due to running out of JVM memory. It's currently 248M, which is nothing for a production environment. How do I increase the values for this?

Bitnami SOLR 5.1.0-0 on Windows 8

dbarranco 2018-01-11 09:57:32 UTC #2

Hi @tkiernanIFRS

You can open the solr script, which is located in INSTALLDIR/apache-solr/bin/solr and add this environment variable to configure the JVM memory:

SOLR_JAVA_MEM="-Xms10g -Xmx10g"

Note: In my case the INSTALLDIR placeholder was C:/Bitnami/

You have a detailed explanation of this here.

Do not forget to stop the services before modifying the solr script and starting them after modifying it.

Furthermore, I would take a look at this Stackoverflow case

Best regards.

tkiernanIFRS 2018-01-11 10:12:47 UTC #3

Yeah, I found that. However, I have no bin folder in that drive. Neither do any of the other installations of 5.1.0-0 we have. Later versions we are using in other solutions do have a bin folder. Can I just create one and drop the solr file in there?

tkiernanIFRS 2018-01-11 11:58:23 UTC #4

OK, I got a temporary fix for this:

Edit the file [INSTALLDIR]\apache-solr\scripts\serviceinstall.bat

Replace
++JvmOptions=-XX:MaxPermSize=128M
With
++JvmOptions=-XX:MaxPermSize=256M ++JvmOptions=-Xms1024M ++JvmOptions=-Xmx1024M

Open a command prompts as admin

>net stop solrJetty

>sc delete solrJetty

>[INSTALLDIR]\apache-solr\scripts\serviceinstall INSTALL

This will up the JVM memory to 1GB. I've tried other values, but the service will not start. This is enough to give me time to investigate the a proper scale solution

tkiernanIFRS 2018-01-11 12:23:10 UTC #5

I've installed an updated version locally. In the file you mention I can see
JAVAMEM_OPTS=()_
if [ -z "$SOLRHEAP" ] && [ -n "$SOLR_JAVA_MEM" ]; then_
JAVAMEM_OPTS=($SOLR_JAVA_MEM)_
else
SOLRHEAP="${SOLR_HEAP:-512m}"_
JAVAMEM_OPTS=("-Xms$SOLR_HEAP" "-Xmx$SOLR_HEAP")_
fi

Changing the SOLRHEAP:-512m_ value and restarting does nothing to change the jvm-memory

In solr.cmd there is
IF NOT "%SOLRHEAP%"=="" set SOLR_JAVA_MEM=-Xms%SOLR_HEAP% -Xmx%SOLR_HEAP%_
IF "%SOLRJAVA_MEM%"=="" set SOLR_JAVA_MEM=-Xms512m -Xmx512m_
IF "%SOLRJAVA_STACK_SIZE%"=="" set SOLR_JAVA_STACK_SIZE=-Xss256k_

Changing the value here beyond 1024m, results in the service failing to restart. Any ideas?

dbarranco 2018-01-12 14:32:30 UTC #6

Hi @tkiernanIFRS

If you want to use a newer version of Solr, this is the only change I did into my instance.

SOLR_JAVA_MEM="-Xms1g -Xmx1g"

JAVAMEM_OPTS=()_
if [ -z "$SOLRHEAP" ] && [ -n "$SOLR_JAVA_MEM" ]; then_
JAVAMEM_OPTS=($SOLR_JAVA_MEM)_
else
SOLRHEAP="${SOLR_HEAP:-512m}"_
JAVAMEM_OPTS=("-Xms$SOLR_HEAP" "-Xmx$SOLR_HEAP")_
fi

Then I restarted the services with:
sudo /opt/bitnami/ctlscript.sh restart

And in the ninterface of Solr I saw the correct configuration.

For older versions of Solr, like 5.1 you can modify the script used to launch Solr and add the -m parameter, there is a similar case here:

However, that workaround is for Linux machines, in Windows you will have to modify the .bat scripts.

If upgrading to a newer version it's not a problem, I would go with the newer one, as currently it's quite hard to find good documentation for older versions of Solr.

Please, do not hesitate on asking us if you do not understand something clearly.

Hope this helps you.
Kind regards.

system 2018-01-26 14:32:43 UTC #7

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