http://permalink.gmane.org/gmane.comp.db.cassandra.user/14225
but given
https://issues.apache.org/jira/browse/CASSANDRA-2868
and me thinking 2 secs longer I guess it was the leaked native memory from gc
inspector that has been swapped out.
(I didn't believe that mlockall is broken but at that
btw just a reminder that even if jna + mlock works fine, with a large
portion of physical memory
locked by cassandra JVM, you won't get swapping with Cassandra, but
you could possibly get swapping happening on other processes in the
OS,
On Fri, Jul 15, 2011 at 9:47 AM, Chris Burroughs
wrote:
> On
On 07/15/2011 07:24 AM, Daniel Doubleday wrote:
> Also our experience shows that the jna call does not prevent swapping so the
> general advice is disable swap.
Can you confirm you don't get the (paraphrasing) "whoops we tried
mlockall but ulimits denied us" message on startup?
> Also our experience shows that the jna call does not prevent swapping so the
> general advice is disable swap.
That sounds extremely non-likely as it would imply the kernel fails to
honor a successful mlockall(), unless other processes on the same
machine are being swapped out. Did the process r
When using jna the mlockall call will result in all pages locked in rss and
thus reported there so you have either configured -Xms650M or you are running
on a small box and the start script calculated it for you.
Also our experience shows that the jna call does not prevent swapping so the
gener
Looks like mmaped files.
2011/7/15 Donna Li
> **
>
> All:
>
> I download JNA jar and put it to cassandra lib directory. When restart
> cassandra server, I found the physical memory highly increase. There is no
> data saved in cassandra, why so much memory used by cassandra? How can I
> decre
All:
I download JNA jar and put it to cassandra lib directory. When restart
cassandra server, I found the physical memory highly increase. There is
no data saved in cassandra, why so much memory used by cassandra? How
can I decrease the memory usage by cassandra? My version is 0.7.6-2.
Befo
