03-15-2009, 02:23 PM
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Member
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Join Date: Mar 2009
Posts: 17
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Quote:
Originally Posted by mistwang
blocking disk I/O will block lshttpd process
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IOWAIT is the killer.... it is why we went to RAID 10 with 12 15K SAS drives... we increased our IO performance 5x over a 4 disc RAID 10 array (also 15k drives).
In my humble opinion, processor speeds almost make no difference... the key to a fast site (in addition to something like Litespeed) is minimum IOWAIT. It seems to be the major variable that affects web performance.
Anything to reduce IOWAIT is worth it.
Warm regards. |