Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.
Hi, > Thanks, and I'll report my findings back to this list. The problem wasn't caused by the RAID-6 setup. On two RAID-10 arrays the problem persisted. The sync system calls still take quite long. Write performance was actually a bit lower, but nothing to be worried about. MySQL commit performance gains of almost 1500% were achievable by using the following MySQL parameter: innodb_flush_log_at_trx_commit = 2. It simply limits the amount of calls to sync() to once a second. Of course this isn't an ideal situation, but it's good enough to hit production. If anyone has an idea about how to speed up sync(), that'll be really helpful, still. Thanks for all the help sofar. -- Greetings, Joris