similar to: arc_summary.pl results

I would appreciate if somebody can clarify a few points. I am doing some random WRITES (100% writes, 100% random) testing and observe that ARC grows way beyond the "hard" limit during the test. The hard limit is set 512 MB via /etc/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

I am trying to see how ZFS behaves under resource starvation - corner cases in embedded environments. I see some very strange behavior. Any help/explanation would really be appreciated. My current setup is : OpenSolaris 111b (iSCSI seems to be broken in 132 - unable to get multiple connections/mutlipathing) iSCSI Storage Array that is capable of 20 MB/s random writes @ 4k and 70 MB random reads

Was wondering if anyone of you see any issues with the following in Solaris 10 u8 ZFS? System Memory: Physical RAM: 11042 MB Free Memory : 5250 MB LotsFree: 168 MB ZFS Tunables (/etc/system): ARC Size: Current Size: 4309 MB (arcsize) Target Size (Adaptive): 10018 MB (c) Min Size (Hard Limit): 1252 MB (zfs_arc_min) Max Size (Hard Limit): 10018 MB (zfs_arc_max) ARC Size Breakdown: Most Recently

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

Pre-fletching on the file and device level has been disabled yielding good results so far. We''ve lowered the number of concurrent ios from 35 to 1 causing the service times to go even lower (1 -> 8ms) but inflating actv (.4 -> 2ms). I''ve followed your recommendation in setting primarycache to metadata. I''ll have to check with our tester in the morning if it made

I''m running into a issue where there seems to be a high number of read iops hitting disks and physical free memory is fluctuating between 200MB -> 450MB out of 16GB total. We have the l2arc configured on a 32GB Intel X25-E ssd and slog on another32GB X25-E ssd. According to our tester, Oracle writes are extremely slow (high latency). Below is a snippet of iostat: r/s w/s

Hi ZFSers, I''ve been working on merging the Joyent arcstat enhancements with some of my own and am now to the point where it is time to broaden the requirements gathering. The result is to be merged into the illumos tree. arcstat is a perl script to show the value of ARC kstats as they change over time. This is similar to the ideas behind mpstat, iostat, vmstat, and friends. The current

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

Quoting Timo Sirainen <tss at iki.fi>: > On 24 Sep 2015, at 16:26, Rick Romero <rick at havokmon.com> wrote: >> Update.? Only a single reboot has occurred since changing >> defalt_vsz_limit from 384M to 512M.? It would seem that something the >> users are doing is causing that virtual memory size to be exceeded >> (possibly a mailbox search?), and when that

I have a semi-theoretical question about the following code in arc.c, arc_reclaim_needed() function: /* * take ''desfree'' extra pages, so we reclaim sooner, rather than later */ extra = desfree; /* * check that we''re out of range of the pageout scanner. It starts to * schedule paging if freemem is less than lotsfree and needfree. * lotsfree is the high-water mark

Joseph Little wrote: > I''d love to "vote" to have this addressed, but apparently votes for > bugs are no available to outsiders. > > What''s limiting Stanford EE''s move to using ZFS entirely for our > snapshoting filesystems and multi-tier storage is the inability to > access .zfs directories and snapshots in particular on NFSv3 clients.

Running an mmap-intensive workload on ZFS on a X4500, Solaris 10 11/06 (update 3). All file IO is mmap(file), read memory segment, unmap, close. Tweaked the arc size down via mdb to 1GB. I used that value because c_min was also 1GB, and I was not sure if c_max could be larger than c_min....Anyway, I set c_max to 1GB. After a workload run....: > arc::print -tad { . . . ffffffffc02e29e8

Hi there We have a pair of servers running FreeBSD 9.1-RC3 that act as transparent layer 7 loadbalancer (relayd) and pop/imap proxy (dovecot). Only one of them is active at a given time, it's a failover setup. From time to time the active one gets in a state in which the 'thread taskq' thread uses up 100% of one cpu on its own, like here: ---- PID USERNAME PRI NICE SIZE

Has anyone else noticed a significant zfs performance deterioration when running recent opensolaris bits? My 32-bit / 768 MB Toshiba Tecra S1 notebook was able to do a full opensolaris release build in ~ 4 hours 45 minutes (gcc shadow compilation disabled; using an lzjb compressed zpool / zfs on a single notebook hdd p-ata drive). After upgrading to 2007-05-25 opensolaris release bits

Hello. We''re currently using a Sun Blade1000 (2x750MHz, 1G ram, 2x160MB/s mpt scsi buses, skge GigE network) as a NFS backend with ZFS for distribution of free software like Debian (cdimage.debian.org, ftp.se.debian.org) and have run into some performance issues. We are running SX snv_48 and have run with a raidz2 with 7x300G for a while now, just added another 7x300G raidz2 today but

On 24 Sep 2015, at 16:26, Rick Romero <rick at havokmon.com> wrote: > > Update. Only a single reboot has occurred since changing > defalt_vsz_limit from 384M to 512M. It would seem that something the > users are doing is causing that virtual memory size to be exceeded > (possibly a mailbox search?), and when that occurs Dovecot/FreeBSD is not > handling the event as

Hi, I'm running Dovecot EE Version with Debian Squeeze. Version info: ii dovecot-ee-core 1:2.2.13.31-1 secure mail server that supports mbox, maildir, dbox and mdbox mailboxes ii dovecot-ee-dbg 1:2.2.13.31-1 debug symbols for Dovecot ii dovecot-ee-imapd 1:2.2.13.31-1 secure IMAP server that

hi, in the WHATSNEW.txt it is stated that the problem with root-processes in version 2.0.2 is solved. (fromw WHAT'S NEW): > 5). Attempt to fix the AIX 4.1.x/3.x problems where smbd runs as > root. As no-one has given us root access to such a server this > cannot be tested fully, but should work. we have on our samba-server n14: AIX 4.3.2 DCE 2.2.0.5 Samba version 2.0.5a i have it

Opensolaris this ain''t, but zfs-related nevertheless. ----- Forwarded message from Josh Paetzel <josh at ixsystems.com> ----- From: Josh Paetzel <josh at ixsystems.com> Date: Fri, 13 Jul 2012 12:01:24 -0700 To: freenas-announce at lists.sourceforge.net Subject: [Freenas-announce] FreeNAS 8.2.0-RC1 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:12.0) Gecko/20120506

I have a Fedora Core 6 system on which I have built ruby 1.8.6 and rubygems 1.1.1 from source, and installed rails 2.0.2 using rubygems. When I create a new rails app, I get lots of errors that look like they''re coming from internal ruby libraries. Lots of methods redefined, as if I have some duplicate code somewhere. I also get errors when generating a simple model (see below.) I