FWIW: For whatever reason jna memlockall does not work for us. jna call is
successful but cassandra process swaps anyway.
see: http://www.mail-archive.com/user@cassandra.apache.org/msg11235.html
We disabled swap entirely.
On Mar 22, 2011, at 8:56 PM, Chris Goffinet wrote:
> The easiest way to
The easiest way to get memlock to work after putting the jna jar in your
classpath is just run this before:
ulimit -a unlimited
in your init script or before starting cassandra. The default for max locked
memory is 32KB on older kernels, and 64KB on newer ones.
-Chris
On Mar 22, 2011, at 12:5
On Tue, Mar 22, 2011 at 3:44 PM, ruslan usifov wrote:
>
>
> 2011/3/22 Adi
>
>> I have been going through the mailing list and compiling suggestions to
>> address the swapping due to mmap issue.
>>
>> 1) Use JNA (done but)
>> Are these steps also required:
>> - Start Cassandra with CAP_IPC_LOCK (o
2011/3/22 Adi
> I have been going through the mailing list and compiling suggestions to
> address the swapping due to mmap issue.
>
> 1) Use JNA (done but)
> Are these steps also required:
> - Start Cassandra with CAP_IPC_LOCK (or as "root"). (not done)
>
And what is CAP_IPC_LOCK?
I have been going through the mailing list and compiling suggestions to
address the swapping due to mmap issue.
1) Use JNA (done but)
Are these steps also required:
- Start Cassandra with CAP_IPC_LOCK (or as "root"). (not done)
grep Unevictable /proc/meminfo
- set /proc/sys/vm/swappiness to 0
