On 13-01-23 11:16 AM, francis picabia wrote: > > Here are more stats. Do these look average for performance? > It is difficult to understand why the system was working with few > load spikes before. > > A mailman mailing list sends 10kbyte message to 4000 > users having accounts on this cyrus system. If I > grep "Delivered" in the maillog by the minute I can > see how fast the messages are stored. What backend are you using for the duplicate_db (deliver.db)? I've seen much better delivery performance using berkeley-nosync instead of the default (skiplist) for this one. > > e.g.: > # grep Delivered /var/log/maillog | grep 'Jan 23 10:37' | wc -l > 696 > > That is the best. This peak event pushed the load to 14 > for 12 minutes, where it averages 604 messages > delivered to cyrus mailboxes per minute. Is that > reasonable for maximum delivery rate? > > I've also backed out the change (yesterday) to > /sys/block/sda/queue/nr_requests > I think it was pushing the load higher and there is no advantage > in my hardware (SAS with Perc 5/i Raid 5 over 4 disk) > to run with a low value for nr_requests. > > > > > ---- > Cyrus Home Page: http://www.cyrusimap.org/ > List Archives/Info: http://lists.andrew.cmu.edu/pipermail/info-cyrus/ > To Unsubscribe: > https://lists.andrew.cmu.edu/mailman/listinfo/info-cyrus > -- Jean Raby jraby@xxxxxxxxxx :: +1.514.447.4918 (x120) :: www.inverse.ca Inverse inc. :: Leaders behind SOGo (www.sogo.nu) and PacketFence (www.packetfence.org) ---- Cyrus Home Page: http://www.cyrusimap.org/ List Archives/Info: http://lists.andrew.cmu.edu/pipermail/info-cyrus/ To Unsubscribe: https://lists.andrew.cmu.edu/mailman/listinfo/info-cyrus
