hurikhan77 updated this revision to Diff 67627. hurikhan77 retitled this revision from "[Database] Rework handling environment flags" to "[Database] Disable read-ahead to prevent thrashing". hurikhan77 edited the summary of this revision. hurikhan77 added a comment.
Prevent filesystem thrashing in low-mem situations by turning off read-ahead. Access patterns of baloo are unlikely to benefit from read-ahead and preserving cache is more valuable than reading ahead potentially unused data. In low-memory conditions, the random access patterns of Baloo combined with read-ahead tend to dominate the cache. Let Baloo be the slow player here, and leave system cache and memory for interactive performance. REPOSITORY R293 Baloo CHANGES SINCE LAST UPDATE https://phabricator.kde.org/D24538?vs=67626&id=67627 REVISION DETAIL https://phabricator.kde.org/D24538 AFFECTED FILES src/engine/database.cpp To: hurikhan77, ngraham Cc: kde-frameworks-devel, ngraham, #baloo, lots0logs, LeGast00n, fbampaloukas, GB_2, domson, ashaposhnikov, michaelh, astippich, spoorun, bruns, abrahams
