Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hi, we are running a primary/secondary cluster which hosts a zarafa database (among other things). The hardware and network (dedicated dual bonded GBit) should be fast enough and in fact, when the machines are in sync we have no performance problems whatsoever. However, when we need to resync the volumes, the read (!) performance of the MySQL database (all innodb) drops drastically. As this happens only on resync, I wonder where this behavior might come from. We already reduced the syncer rate to absurd values (like 100 kB/s) and still get high IOWaits on the primary as soon as the syncing starts. At 100kbit/s I think I can rule out the disks as bottleneck or am I wrong there? Cheers Jakob