<div class="gmail_quote"><div><br>Here are more stats. Do these look average for performance?<br>It is difficult to understand why the system was working with few<br>load spikes before.<br><br>A mailman mailing list sends 10kbyte message to 4000 <br>
users having accounts on this cyrus system. If I <br>grep "Delivered" in the maillog by the minute I can<br>see how fast the messages are stored.<br><br>e.g.:<br># grep Delivered /var/log/maillog | grep 'Jan 23 10:37' | wc -l<br>
696<br><br>That is the best. This peak event pushed the load to 14<br>for 12 minutes, where it averages 604 messages<br>delivered to cyrus mailboxes per minute. Is that<br>reasonable for maximum delivery rate?<br>
<br>I've also backed out the change (yesterday) to /sys/block/sda/queue/nr_requests<br>I think it was pushing the load higher and there is no advantage<br>in my hardware (SAS with Perc 5/i Raid 5 over 4 disk)<br>to run with a low value for nr_requests.<br>
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