You are viewing a plain text version of this content. The canonical link for it is here.

Posted to user@cassandra.apache.org by Lukas Steiblys <lu...@doubledutch.me> on 2014/03/12 20:40:05 UTC

Java heap size does not change on Windows

I am running Windows Server 2008 R2 Enterprise on a 2 Core Intel Xeon with 16GB of RAM and I want to change the max heap size. I set MAX_HEAP_SIZE in cassandra-env.sh, but when I start Cassandra, it’s still reporting:

INFO 12:37:36,221 Global memtable threshold is enabled at 247MB
INFO 12:37:36,377 using multi-threaded compaction
INFO 12:37:36,705 JVM vendor/version: Java HotSpot(TM) 64-Bit Server VM/1.7.0_51
INFO 12:37:36,705 Heap size: 1037959168/1037959168

My question is: how do I change the heap size?

Lukas Steiblys

Re: Java heap size does not change on Windows

Posted by Tyler Hobbs <ty...@datastax.com>.

cassandra-env.sh is only used on *nix systems.  You'll need to change
bin/cassandra.bat.  Interestingly, that's hardcoded to use a 1G heap, which
seems like a bug.


On Wed, Mar 12, 2014 at 2:40 PM, Lukas Steiblys <lu...@doubledutch.me>wrote:

>   I am running Windows Server 2008 R2 Enterprise on a 2 Core Intel Xeon
> with 16GB of RAM and I want to change the max heap size. I set
> MAX_HEAP_SIZE in cassandra-env.sh, but when I start Cassandra, it's still
> reporting:
>
> INFO 12:37:36,221 Global memtable threshold is enabled at 247MB
> INFO 12:37:36,377 using multi-threaded compaction
> INFO 12:37:36,705 JVM vendor/version: Java HotSpot(TM) 64-Bit Server
> VM/1.7.0_51
> INFO 12:37:36,705 Heap size: 1037959168/1037959168
>
> My question is: how do I change the heap size?
>
> Lukas Steiblys
>
>



-- 
Tyler Hobbs
DataStax <http://datastax.com/>