On 09 April, 2010 - Abdullah Al-Dahlawi sent me these 27K bytes: > Hi all > > I ran an OLTP-Filebench workload > > I set Arc max size = 2 gb > l2arc ssd device size = 32gb > workingset(dataset) = 10gb , 10 files , 1gb each > > after running the workload for 6 hours and monitoring kstat , I have noticed > that l2_size from kstat has reached 10gb which is great . however, l2_size > started to drop all the way to 7gb !!!! which means that the workload will > go back to the HDD to retirive some data that are no longer on l2arc device > . > > I understand that l2arc size reflected by zpool iostat is much larger > becuase of COW and l2_size from kstat is the actual size of l2arc data. > > so can any one tell me why I am loosing my workingset from l2_size actual > data !!!
Maybe the data in the l2arc was invalidated, because the original data was rewritten? /Tomas -- Tomas Ögren, st...@acc.umu.se, http://www.acc.umu.se/~stric/ |- Student at Computing Science, University of Umeå `- Sysadmin at {cs,acc}.umu.se _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
