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Message-ID: <CA+pWcCZ66+=YYH-orwP71eTcyeaDzWF6bQ4viPCC=szPLhUXow@mail.gmail.com> Date: Thu, 12 Apr 2012 13:36:45 +0200 From: Karol Šebesta <sebesta.karol@...il.com> To: Rik van Riel <riel@...hat.com>, linux-kernel@...r.kernel.org Subject: Re: extreme system load [kswapd] # cat /proc/sys/vm/zone_reclaim_mode 0 # The value is set to zero, and we have these problems.... interesting... Regards, Karol Sebesta 2012/4/12 Karol Šebesta <sebesta.karol@...il.com>: > Hello Rik, > > Thank you for answer, but now we are facing to another interesting > issue on our redhat 5.6 server. > > It seems that linux dropped almost all disk cache and now it trying to > gain disk cache space by swapping. That is the reason why kswapd > process loads the system. > > ### as you can see almost all RAM is free ( that is bad ) - some time > ago there was all RAM cached in disk cache > > [root@...u0216 ~]# free -m > total used free shared buffers cached > Mem: 128861 29814 99047 0 108 20186 > -/+ buffers/cache: 9519 119342 > Swap: 81919 16614 65305 > [root@...u0216 ~]# > > > Do you think that can be a problem with NUMA nodes or what can be the > reason that Linux itself dropped almost all disk cache? > > Thank you. > > Regards, > > Karol Sebesta -- S pozdravom Karol Šebesta -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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