Date: Thu, 17 Apr 2008 19:16:53 +0300 From: Ruslan Kovtun <yalur@mail.ru> To: freebsd-fs@freebsd.org Subject: Re: Choppy performance. Message-ID: <200804171916.53330.yalur@mail.ru> In-Reply-To: <24adbbc00804170842l28ca072fta081ea02ab70f3bd@mail.gmail.com> References: <24adbbc00804151529m2a74085ds468eaac55ba94a32@mail.gmail.com> <70e8236f0804170723i13136c11scca7a818a7ffc89b@mail.gmail.com> <24adbbc00804170842l28ca072fta081ea02ab70f3bd@mail.gmail.com>
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17 2008 Daniel Andersson Wrote: > >Turning off prefetch improved my workload (I play video from it for > > > > >ex, no more skiped frames) > > > > Okay, I'll try it. Guess I'll have to reboot..=3DD > > > > >raidz isn't mirroring, that would be the mirror option. > > >You loose one disk's storage for parity when you use raidz, and since > > >you only added 2 disks to that raidz you lose 50% of your storage > > >space. It has the appearance of mirroring but in fact it's not. > > >Your choice of a raidz was wrong for what you really needed and you > > >have to destroy the raidz pool to be able to change it. > > I suspected it was something like that, for the lack of a better > word I used mirroring. Thanks for clearing it up for me! > > >Instead of using: > > >zpool create yourpoolname raidz disk1 disk2 > > >use: > > >zpool create yourpoolname disk1 disk2 > > Okay, I'll try that. I guess I was a little too eager to try out ZFS > and didn't read up properly. =3DP > > >Ruslan Wrote: > > I have the same problem - rtorrent to hang temporarily during high load. > >Today I installed additional 2 GB RAM and now I have 4Gb. With this > >configuration hanging is more less but still exist (during ZFS upload da= ta > > to > > >pool and swap use>0). > >Seems, If swap not used (=3D0) then no any hanging. > >So, More RAM - more beter. > > Okay. My server box's mobo only has two slots for RAM.=3D( > A curious thing happened today with rtorrent. I had set > rtorrent so that it couldn't use more than 3072MB of ram. > (2048MB RAM + swap). rtorrent said it was using 2800MB > but when I checked with top the swap wasn't in use at all? How do you calculate totall memory use in top? Real memory use is present=20 in "RES" column but not in "SIZE" column.=20 ################################ PID USERNAME =9ATHR PRI NICE =9A SIZE =9A =9ARES STATE =9A =9ATIME =9A WCPU= COMMAND 1215 =9A =9A =9A =9A =9A engy =9A =9A =9A =9A1 =9A99 =9A =9A0 =9A2085M =9A= 139M zfs:(& =9A49:32 19.53% =9A =9A =9Artorrent ################################ > _______________________________________________ > freebsd-fs@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-fs > To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org" =2D-=20 ________________ =F3 =D5=D7=C1=D6=C5=CE=C9=C5=CD =EB=CF=D7=D4=D5=CE =F2=D5=D3=CC=C1=CE mailto <yalur@mail.ru>
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