On 09/08/2015 08:11 AM, Jorgeley Junior wrote:
Thank you all, this is the output: vm.overcommit_memory = 0 vm.swappiness = 60 I have a Redhat 6.6
The value of vm.overcommit_memory is OK. The default value for vm.swappiness is way too high. It means that Linux swaps out parts of processes when they are idle for a while. For better overall system performance, you want those processes in memory as long as possible and not swapped out so I recommend to change it to 15. This implies that the OS has 15% of the physical memory available for file system buffers which is plenty. You only mentioned that the swap is 32 GB. What is the size of the physical memory ? Did you already increase the swap ? Marcus
2015-09-05 15:08 GMT-03:00 Marcus Kool <marcus.kool@xxxxxxxxxxxxxxx <mailto:marcus.kool@xxxxxxxxxxxxxxx>>: On Linux, an important sysctl parameter that determines how Linux behaves with respect to VM allocation is vm.overcommit_memory (should be 0). And vm.swappiness is important to tune servers (should be 10-15). Which version of Linux do you have and what is the output of sysctl -a | grep -e vm.overcommit_memory -e vm.swappiness Marcus On 09/04/2015 07:04 PM, Jorgeley Junior wrote: Thanks Amos, i will increase the swap Em 04/09/2015 17:22, "Amos Jeffries" <squid3@xxxxxxxxxxxxx <mailto:squid3@xxxxxxxxxxxxx> <mailto:squid3@xxxxxxxxxxxxx <mailto:squid3@xxxxxxxxxxxxx>>> escreveu: On 5/09/2015 7:16 a.m., Jorgeley Junior wrote: > Thanks Amos, my swap is 32GB, so that's causing the error as you said. > Which is the better choice: increase the swap size or reduce the > cache_mem??? > Both probably. 128 GB swap I suspect you will need. Increase the swap so the system lets Squid use more virtual memory. Decrease the cache_mem so that Squid does not actually end up using the swap for its main worker processes. That is a real killer for performance. Amos _______________________________________________ squid-users mailing list squid-users@xxxxxxxxxxxxxxxxxxxxx <mailto:squid-users@xxxxxxxxxxxxxxxxxxxxx> http://lists.squid-cache.org/listinfo/squid-users -- *_ _* *_ _*
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