Date: Wed, 17 Feb 2010 09:19:49 +0100 From: Bartosz Stec <bartosz.stec@it4pro.pl> To: jhell <jhell@DataIX.net> Cc: Alexander Leidinger <Alexander@Leidinger.net>, FreeBSD Stable <freebsd-stable@freebsd.org>, Peter Jeremy <peterjeremy@acm.org>, Jeremy Chadwick <freebsd@jdc.parodius.com> Subject: Re: ZFS tuning [was: hardware for home use large storage] Message-ID: <4B7BA6A5.9020306@it4pro.pl> In-Reply-To: <alpine.BSF.2.00.1002170241080.14189@pragry.qngnvk.ybpny> References: <cf9b1ee01002150049o43fced71ucb5776a0a1eaf4cf@mail.gmail.com> <20100215090756.GA54764@icarus.home.lan> <20100215105000.101326yj01j0f64g@webmail.leidinger.net> <20100215122744.GA57382@icarus.home.lan> <20100215161105.14071eiflhc9le68@webmail.leidinger.net> <4B79BA9C.3020402@quip.cz> <alpine.BSF.2.00.1002152024040.74553@pragry.qngnvk.ybpny> <4B7AD0A3.9080701@barryp.org> <20100216175946.GA98082@icarus.home.lan> <20100216200511.GA95812@server.vk2pj.dyndns.org> <20100216215637.GA4299@icarus.home.lan> <alpine.BSF.2.00.1002170241080.14189@pragry.qngnvk.ybpny>
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On 2010-02-17 08:58, jhell wrote: > > To all those involved in this. > > More up-to-date: arc_summary.pl r182 > > > Best regards. > > And watching for replies, > So here's my reply (last line seems most interesting ;) : # ./arc_summary.pl --------------------------------------------------------------------- System Summary śro 17 lut 2010 08:16:37 UTC FreeBSD 9.0-CURRENT #20: Fri Feb 12 19:21:34 CET 2010 ncpnc Kernel Version: 900009 (osreldate) Hardware Platform: i386 Processor Architecture: i386 Storage pool Version: 14 Filesystem Version: 3 Physical RAM: 1523.41 MiB Kernel Memory Usage TEXT: 9782828, 9.33 MiB DATA: 216801280, 206.76 MiB TOTAL: 226584108, 216.09 MiB 9:16 up 4 days, 6:54, 1 user, load averages: 0,47 0,92 0,59 --------------------------------------------------------------------- ARC Summary Meta Limit: 120.00 MiB Meta Used: 135.00% 162.00 MiB Throttle Count: 0 ARC Size: Current Size: 190.03 MiB (arcsize) Target Size (Adaptive): 209.12 MiB (c) Min Size (Hard Limit): 60.00 MiB (arc_min) Max Size (Hard Limit): 480.00 MiB (arc_max) ARC Size Breakdown: Recently Used Cache Size: 16.00% 33.46 MiB (p) Frequently Used Cache Size: 84.00% 175.66 MiB (c-p) ARC Efficiency: Cache Access Total: 28459411 Cache Hit Ratio: 94.57% 26913166 Cache Miss Ratio: 5.43% 1546245 Actual Hit Ratio: 81.81% 23282481 Data Demand Efficiency: 99.48% Data Prefetch Efficiency: 54.15% CACHE HITS BY CACHE LIST: Anonymous: 11.07% 2978474 Most Recently Used: 16.42% 4419712 (mru) Most Frequently Used: 70.09% 18862769 (mfu) Most Recently Used Ghost: 0.98% 264205 (mru_ghost) Most Frequently Used Ghost: 1.44% 388006 (mfu_ghost) CACHE HITS BY DATA TYPE: Demand Data: 53.58% 14419664 Prefetch Data: 0.07% 20017 Demand Metadata: 32.68% 8794182 Prefetch Metadata: 13.67% 3679303 CACHE MISSES BY DATA TYPE: Demand Data: 4.88% 75410 Prefetch Data: 1.10% 16946 Demand Metadata: 59.18% 915133 Prefetch Metadata: 34.84% 538756 L2 ARC Summary Low Memory Aborts: 0 Bad Checksums: 0 IO Errors: 0 L2 ARC Size: Current Size: 0.00 MiB Header Size: 0.00 MiB L2 ARC Breakdown: L2 Access Total: 0 Illegal division by zero at ./arc_summary.pl line 242. -- Bartosz Stec
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