What does top say? On 3 April 2015 at 02:34, Shrinand Javadekar <shrinand at maginatics.com> wrote: > Hi, > > I have a single node Swift instance. It has 16 cpus, 8 disks and 64GB > memory. As part of testing, I am doing 256 object writes in parallel > for ~10 mins. Each object is also 256K bytes in size. > > While my experiment is running, I see that the CPU utilization of the > box is always ~100%. I am trying to understand what is causing this > high CPU utilization. Some of this could be attributed to: > > 1. MD5 checksum calculation done to verify every PUT. > 2. MD5 checksum calculation by the auditor (if it runs during this > interval). > 3. Hash calculation of the path to decide which partition the object goes > to. > > Are there any other CPU intensive operations happening on the system > that I should be aware of? > > I see that the proxy-server has a "PUT" queue. Is there some > processing of the data in this queue? Would simply putting data in and > out of the queue, streaming the data between the proxy and object > server use considerable CPU? > > Thanks in advance. > -Shri > > _______________________________________________ > Mailing list: > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > Post to : openstack at lists.openstack.org > Unsubscribe : > http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.openstack.org/pipermail/openstack/attachments/20150403/b7b2e49c/attachment.html>