search for: arc_summary

Was wondering if anyone can see any issues with the ARC in the following output? bash-3.00# ./arc_summary.pl System Memory: Physical RAM: 6023 MB Free Memory : 784 MB LotsFree: 90 MB ZFS Tunables (/etc/system): ARC Size: Current Size: 1159 MB (arcsize) Target Size (Adaptive): 2106 MB (c) Min Size (Hard Limit): 624 MB (zfs_arc_min) Max Size (Hard Limit): 4999 MB (zfs_arc_max) ARC Size Breakdown: Most...

Would someone "in the know" be willing to write up (preferably blog) definitive definitions/explanations of all the arcstats provided via kstat? I''m struggling with proper interpretation of certain values, namely "p", "memory_throttle_count", and the mru/mfu+ghost hit vs demand/prefetch hit counters. I think I''ve got it figured out, but

Hi all, I have exchanged my Dell R610 in favor of a Sun Fire 4170 M2 which has 32 GB RAM installed. I am running Sol11Expr on this host and I use it to primarily serve Netatalk AFP shares. From day one, I have noticed that the amount of free RAM decereased and along with that decrease the overall performance of ZFS decreased as well. Now, since I am still quite a Solaris newbie, I seem to

...system and I see the size going up to 1 GB - how come is it happening? mdb''s ::memstat reports 1.5 GB used - does this include ARC as well or is it separate? I see on the backed only reads (205 MB/s) and almost no writes (1.1 MB/s) - any ides what is being read? --- BEFORE TEST # ~/bin/arc_summary.pl System Memory: Physical RAM: 12270 MB Free Memory : 7108 MB LotsFree: 191 MB ZFS Tunables (/etc/system): set zfs:zfs_prefetch_disable = 1 set zfs:zfs_arc_max = 0x20000000 set zfs:zfs_arc_min = 0x10000000 ARC Size: Current S...

...more physical > memory?? From http://blogs.sun.com/brendan/entry/test, the order that > a read request is satisfied is: > > > > 1) ARC > > 2) vdev cache of L2ARC devices > > 3) L2ARC devices > > 4) vdev cache of disks > > 5) disks > > > > Using arc_summary.pl, we determined that prefletch was > not helping much so we disabled. > > > > CACHE HITS BY DATA TYPE: > >? ? ? ? ???Demand > Data:? ? ? ? ? ? ? ? > 22%? ? ? ? 158853174 > >? ? ? ? ???Prefetch > Data:? ? ? ? ? ? ? > 17%? ? ? ? > 123009991???<---not hel...

...0.0 0.5 0.0 0.5 0.0 22.8 0 33 c1t14d0 Is this an indicator that we need more physical memory? From http://blogs.sun.com/brendan/entry/test, the order that a read request is satisfied is: 1) ARC 2) vdev cache of L2ARC devices 3) L2ARC devices 4) vdev cache of disks 5) disks Using arc_summary.pl, we determined that prefletch was not helping much so we disabled. CACHE HITS BY DATA TYPE: Demand Data: 22% 158853174 Prefetch Data: 17% 123009991 <---not helping??? Demand Metadata: 60% 437439104...

Hi, Please forgive me if my searching-fu has failed me in this case, but I''ve been unable to find any information on how people are going about monitoring and alerting regarding memory usage on Solaris hosts using ZFS. The problem is not that the ZFS ARC is using up the memory, but that the script Nagios is using to check memory usage simply sees, say 96% RAM used, and alerts. The

...name to avoid potential confusion when looking at the disk image vs the GUI upgrade image (SF r10154). Middleware ------------------------ 1. Do not restart collectd (reporting backend) when deleting snapshots in the GUI (SF r10139). Tools ------------------------ 1. Add arcstat.py and arc_summary.py tools originally contributed by jhell (FreeBSD contributor), ported by jhixson to FreeNAS 8.x. Bugfixes ======================== GUI ------------------------ 1. Correct window title for snapshot deletion GUI (SF r10138). Middleware ------------------------ 1. Catch ZFS snapshot errors wh...