Comment 40 for bug 131094

Amit,

trackerd uses the best effort 7 disk io schedule by default (it tries idle class first but as that needs root it will fail and default to BE 7)

note disk writes are not affected by the schedule as they are controlled by pdflush and heavy writing is where the problem lies (pdflush tends to go crazy)

tracker 0.6.3 mitigates the pdflush problems by intermittently calling fsync when merging indexes to prevent pdflush from taking over the disk and starving other apps