On Jun 3, 2010, at 10:33 AM, Ketan wrote: > We are having a server running zfs root with 64G RAM and the system has 3 > zones running oracle fusion app and zfs cache is using 40G memory as per > > kstat zfs:0:arcstats:size. and system shows only 5G of memory is free rest is > taken by kernel and 2 remaining zones. > > Now my problem is that fusion guys are getting not enough memory message > while starting their application due to top and vmstat shows 5G as free > memory. But i read ZFS cache releases memory as required by the application > so why fusion application is not starting up.
ZFS will release the memory, but sometimes this can take a moment and in the meantime, applications which are not written to retry allocations are likely to bail out. > Is there some we can do to decrease the ARC Cache usage on the fly without > rebooting the global zone ? This is a case where limiting the ARC size can be useful. For more information see the ZFS Evil Tuning Guide http://www.solarisinternals.com/wiki/index.php/ZFS_Evil_Tuning_Guide#Limiting_the_ARC_Cache -- richard -- Richard Elling rich...@nexenta.com +1-760-896-4422 ZFS and NexentaStor training, Rotterdam, July 13-15, 2010 http://nexenta-rotterdam.eventbrite.com/ _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
