What RAID backend are you using? If it's RAID 5, then I would search
the web on how to lower iowait for that card.
The 3ware (LSI) 9550SX card is notorious for high IOWAIT when using RAID 5.
On 9/27/2010 2:37 PM, Christoffer Andersson wrote:
I have big problems with high IO; gfs2_logd and pdflush uses 99% IO
every 2 minutes, and this makes everything freeze for ~15 seconds.
Both servers are in the same hall and connected via 100Mbit.
I'm attaching a screenshot of 'iotop' and my drbd.conf
Anybody got ideas what might be wrong?
Best regards
Christoffer
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