Date: Thu, 30 Jul 2015 15:55:01 +0300 From: Lev Serebryakov <lev@FreeBSD.org> To: Konstantin Belousov <kostikbel@gmail.com> Cc: freebsd-fs@freebsd.org Subject: Re: ZFS on 10-STABLE r281159: programs, accessing ZFS pauses for minutes in state [*kmem arena] Message-ID: <1617907428.20150730155501@serebryakov.spb.ru> In-Reply-To: <20150730124829.GV2072@kib.kiev.ua> References: <164833736.20150730143008@serebryakov.spb.ru> <20150730121840.GS2072@kib.kiev.ua> <34202837.20150730153905@serebryakov.spb.ru> <20150730124829.GV2072@kib.kiev.ua>
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Hello Konstantin, Thursday, July 30, 2015, 3:48:29 PM, you wrote: >> >> rsync pauses for tens of minutes (!) after several hundreds of files. ^T >> >> and top shows state "[*kmem arena]". When I stop rsync with ^C and try to do >> >> "zfs list" it waits forever, in state "[*kmem arena]" again. >> > Show the output of sysctl debug.vmem_check. >> It is 1. > So set it to zero. It improved situation by itself, but limiting ARC to 3GiB is helped much more. Looks like, ARC auto-sizing should be tuned anyway (PR187594? It is already more than year old!) -- Best regards, Lev mailto:lev@FreeBSD.org
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