search for: dmis

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2009 Oct 15
8
sub-optimal ZFS performance
...4958 58 1% Free (cachelist) 6849 26 1% Free (freelist) 399498 1560 39% Total 1027660 4014 Physical 1027659 4014 arcstat first run: Time read miss miss% dmis dm% pmis pm% mmis mm% arcsz c 21:02:31 279 19 7 11 4 7 30 11 10 439M 3G 21:12:31 190 60 31 52 28 8 97 60 32 734M 3G 21:22:31 225 58 25 57 25 0 94 58 25 873M 3G 21:32:31 206 51 24...
2010 Mar 02
9
Filebench Performance is weird
...The output for the same workload is disappointing , notice that the throughput dropped from 1307.7 mb/s to 2.7 mb/s !!!!!!!!!!!!!!!!!!!!!!1 My ARC_max is 3G Here is a snapshot of my arcstat output in case of high throughput --- notice the 100% hits ratio arcsz,read,hits,Hit%,miss,miss%,dhit,dh%,dmis,dm%,phit,ph%,pmis,pm%,mhit,mh%,mmis,mm%,mfug,mrug, 1G, 31M, 31M, 99,111K, 0, 28M, 99, 99K, 0, 2M, 99, 12K, 0, 1M, 98, 13K, 1, 43, 43, 1G,147K,145K, 99, 1K, 0, 14K, 99, 2, 0,131K, 99, 1K, 0, 0, 0, 0, 0, 0, 0, 1G,166K,166K, 100, 0, 0, 37K,100, 0, 0,128K,...
2009 Jan 24
3
zfs read performance degrades over a short time
I appear to be seeing the performance of a local ZFS file system degrading over a short period of time. My system configuration: 32 bit Athlon 1800+ CPU 1 Gbyte of RAM Solaris 10 U6 SunOS filer 5.10 Generic_137138-09 i86pc i386 i86pc 2x250 GByte Western Digital WD2500JB IDE hard drives 1 zfs pool (striped with the two drives, 449 GBytes total) 1 hard drive has
2015 Aug 12
2
[Intel-gfx] [PATCH v2 00/22] Enable gpu switching on the MacBook Pro
Hi Daniel, On Wed, Aug 12, 2015 at 04:16:25PM +0200, Daniel Vetter wrote: > > * Reprobing if the inactive GPU initializes before the apple-gmux module: > > v1 used Matthew Garrett's approach of adding a driver callback. > > v2 simply generates a hotplug event instead. nouveau polls its outputs > > every 10 seconds so we want it to poll immediately once apple-gmux
2011 Jan 24
0
ZFS/ARC consuming all memory on heavy reads (w/ dedup enabled)
...] Primarycache property: NAME PROPERTY VALUE SOURCE somepool primarycache all local rpool/swap primarycache metadata local ./arcstat.pl (last few lines before the system locks up): Time read miss miss% dmis dm% pmis pm% mmis mm% arcsz c 15:56:34 121K 247 0 243 0 4 0 178 1 151M 402M 15:56:35 0 0 0 0 0 0 0 0 0 137M 402M 15:56:36 14K 25 0 25 0 0 0 24 0 265M 402M 15:56:37 381K 575 0 575 0...
2011 Apr 25
3
arcstat updates
...RC reads per second throt : Memory throttles per second mfu : MFU list hits per second l2read : Total L2ARC accesses per second mmis : Metadata misses per second rmis : recycle_miss per second mhit : Metadata hits per second dmis : Demand data misses per second mru : MRU list hits per second ph% : Prefetch hits percentage eskip : evict_skip per second l2size : L2ARC size l2hits : L2ARC hits per second hit% : ARC hit percentage miss% : ARC miss percenta...
2011 Jan 12
6
ZFS slows down over a couple of days
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
2012 Jun 06
24
Occasional storm of xcalls on segkmem_zio_free
So I have this dual 16-core Opteron Dell R715 with 128G of RAM attached to a SuperMicro disk enclosure with 45 2TB Toshiba SAS drives (via two LSI 9200 controllers and MPxIO) running OpenIndiana 151a4 and I''m occasionally seeing a storm of xcalls on one of the 32 VCPUs (>100000 xcalls a second). The machine is pretty much idle, only receiving a bunch of multicast video streams and
2010 Jan 12
11
How do separate ZFS filesystems affect performance?
...48 2509209 2682880 227 93 45 89 603304 120660 204344 9179136 1835827 2084864 179 89 23 67 948896 189779 346520 15880192 3176038 4173824 262 108 32 123 # /usr/local/sbin/arcstat 5 5 Time read miss miss% dmis dm% pmis pm% mmis mm% arcsz c 10:50:16 191M 31M 16 14M 8 17M 48 18M 12 30G 32G 10:50:21 1K 148 10 76 5 72 58 78 15 30G 32G 10:50:26 1K 154 12 88 7 65 72 96 18 30G 32G 10:50:31 796 61 7 54...