Info on tuning the ARC was just recently updated: http://www.solarisinternals.com/wiki/index.php/ZFS_Best_Practices_Guide#Memory_and_Dynamic_Reconfiguration_Recommendations
-r Rainer Heilke writes: > Thanks for the feedback. Please see below. > > > ZFS should give back memory used for cache to system > > if applications are demanding it. Right it should but sometimes it > > won't. > > > > However with databases there's simple workaround - as > > you know how much ram all databases will consume at least you can > > limit ZFS's arc cache to remaining free memory (and possibly reduce > > it even more byt 2-3x factor). For details on how to do it see 'C'mon > > ARC, stay small...' thread here. > > > > So if you have 16GB RAM in a system and want 10GB for > > SGA + another 2GB for Oracle + 1GB for other kernel resources you > > are with 3GB left. > > > > So I would limit arc c_max to 3GB or even to 1GB. > > I was of the understanding that this kernel setting was only introduced in > newer Nevada builds. Does this actually work under Solaris 10, Update 3? > > Thanks again. > Rainer > > > This message posted from opensolaris.org > _______________________________________________ > zfs-discuss mailing list > zfs-discuss@opensolaris.org > http://mail.opensolaris.org/mailman/listinfo/zfs-discuss _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
