Re: TrafficServer and IO/Wait

2014-06-04 Thread Jean Baptiste Favre
Hello, I agree that it could be about VM/ATS settings. Anyway, here are the info you wanted. # grep thread /etc/trafficserver/records.config CONFIG proxy.config.exec_thread.autoconfig INT 1 CONFIG proxy.config.exec_thread.autoconfig.scale FLOAT 1.50 CONFIG proxy.config.exec_thread.limit INT 2

Re: TrafficServer and IO/Wait

2014-06-04 Thread jtomo...@yahoo.com.INVALID
Hi Baptiste, In my opinion it's all about your VM/ATS settings. Can you post these clues: cat /proc/interrupts cat etc/trafficserver/records.config | grep thread cat etc/trafficserver/storage.config | grep dev lshw -c disk -c volume Cheers JT From: Jan-Frode Myklebust ; To: ; Subject: Re: Traf

Re: TrafficServer and IO/Wait

2014-06-04 Thread Jan-Frode Myklebust
On Wed, Jun 04, 2014 at 11:28:07AM +0200, Jean Baptiste Favre wrote: > Hello, > Each VM has 4GB memory. > > traffic_line -r proxy.config.cache.ram_cache.size gives 2147483648 I would consider increasing proxy.config.cache.ram_cache.size to at least 3GB on your 4GB VMs. Assuming ATS will have bett

Re: TrafficServer and IO/Wait

2014-06-04 Thread Jean Baptiste Favre
Hello, Each VM has 4GB memory. traffic_line -r proxy.config.cache.ram_cache.size gives 2147483648 Cache is splitted on 3 raw disks (sdb, sdc & sdd). Each disk is 10GB and cache is full: traffic_line -r proxy.process.cache.percent_full gives 99 I'm not sure how I can find cached entry number. In

Re: TrafficServer and IO/Wait

2014-06-04 Thread Jan-Frode Myklebust
How much memory does the VM have? How much proxy.config.cache.ram_cache.size have you given it? How much data are you caching? How much is delivered to clients ? -jf

TrafficServer and IO/Wait

2014-06-04 Thread Jean Baptiste Favre
Hi all, I'm using Trafficserver 4.2.0 on Debian Wheezy, with raw disks as cache on VMware virtual machines. Activity level is a bit less than 400 requests per seconds with a cache hit ratio greater than 99%. On a regular basis, traffic_server process (ET_NET 0) starts to heavily use CPU (more than