in solaris zfs cache many things, you should have more ram if you setup 18gb swap , imho, ram should be high than 4gb regards
Sent from my iPad On Jun 25, 2012, at 5:58, tpc...@mklab.ph.rhul.ac.uk wrote: >> >> 2012-06-14 19:11, tpc...@mklab.ph.rhul.ac.uk wrote: >>>> >>>> In message <201206141413.q5eedvzq017...@mklab.ph.rhul.ac.uk>, >>>> tpc...@mklab.ph.r >>>> hul.ac.uk writes: >>>>> Memory: 2048M phys mem, 32M free mem, 16G total swap, 16G free swap >>>> My WAG is that your "zpool history" is hanging due to lack of >>>> RAM. >>> >>> Interesting. In the problem state the system is usually quite responsive, >>> eg. not memory trashing. Under Linux which I'm more >>> familiar with the 'used memory' = 'total memory - 'free memory', refers to >>> physical memory being used for data caching by >>> the kernel which is still available for processes to allocate as needed >>> together with memory allocated to processes, as opposed to >>> only physical memory already allocated and therefore really 'used'. Does >>> this mean something different under Solaris ? >> >> Well, it is roughly similar. In Solaris there is a general notion > > [snipped] > > Dear Jim, > Thanks for the detailed explanation of ZFS memory usage. Special > thanks also to John D Groenveld for the initial suggestion of a lack of RAM > problem. Since up-ing the RAM from 2GB to 4GB the machine has sailed though > the last two Sunday mornings w/o problem. I was interested to > subsequently discover the Solaris command 'echo ::memstat | mdb -k' which > reveals just how much memory ZFS can use. > > Best regards > Tom. > > -- > Tom Crane, Dept. Physics, Royal Holloway, University of London, Egham Hill, > Egham, Surrey, TW20 0EX, England. > Email: T.Crane@rhul dot ac dot uk > _______________________________________________ > 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
