search for: 123ms

...for small files" hints. All these suggestions have been tested but did not or only slightly improve performance. Can anyone please tell me ... - Is there a way to check the amount of time that the different parts of a file operation take (like 1ms requesting metadata, 1ms receiving metadata, 123ms reading blocks from OST, ...)? - Does anyone have a hint on what could be the problem, where to search or what to do? Any help is much appreciated! Thanks! Robert

Hi All, I am using CentOS 6.4 on 4 servers, guests are also CentOS 6.4 Network is setup using virtio, and vhost, this works well but sometime I see connection issue from application to DB. I found that sometimes latency increases from 0.200 ms approx to 123ms or even more sometimes, this happens only for 1-2 packets but keep happening after sometime. CPU load remains under 1, CPU usages is around 20-30%. If I ping from host machine to host machine then there is consistent latency, this only happens when ping from a guest machine to either other guest...