On 2012-03-23 05:53, Sebastian Melchior wrote:
Hi,
we already used iostat and iotop during times of the slowdown, there is no
sudden drop in I/O workload in the times of the slowdown. Also the iowait does
not spike and stays as before.
So i do not think that this is I/O related. As the disks are SSDs there also still is
some "head room" left.
I've seen a ssd completely lock up for a dozen seconds or so after
giving it a smartctl command to trim a section of the disk. I'm not sure
if that was the vertex 2 pro disk I was testing or the intel 710, but
enough reason for us to not mount filesystems with -o discard.
regards,
Yeb
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