May 23, 2012

Post: RAID System performance surprises

checks periodically. When it wakes up it will some IO resources (30% by default) which will affect your performance some way. Consistency Checks… have and see how they can be controlled – may be schedule them during least busy intervals or something similar. Also you… slack of the system. It often would be enough for consistency check and patrol read but not for battery backed up cache…

Post: SHOW INNODB STATUS walk through

… in additional memory pool (so you can check if it is sized right), total number …active, state of Innodb main thread which controls scheduling of number of system operations – flushing dirty pages,… thing to note – SHOW INNODB STATUS is not consistent – it does not correspond to some particular …

Post: MySQL Storage Engines - PBXT

…tables. This is of course something which is scheduled to be fixed before stable release but …multi-versioning – if you’re using consistent reads isolation mode this consistent reads is per database not global… are expected to happen anyway. We also checked for CPU bound workload – with disk IO …

Comment: Falcon Storage Engine Design Review

… be interested in the results. If it’s consistently faster, I’ll change my mind. Row Cache… When the upper limit is reached, a regularly scheduled scavenge thread prunes out old generations until the…size of indexes overwhelms the additional cost of checking records in those cases where the query …