Hi John, Process of checkpointing makes all dirty pages to be written to disk. As result they will become clean (non dirty)
When checkpoiting is not running, dirty page can't be evicted (if Persistent Data storage mode is enabled). Only clean page may be evicted from memory. In the same time too much dirty pages (for example 75%) will trigger checkpoint process. Sincerely, Dmitriy Pavlov чт, 7 сент. 2017 г. в 1:45, John Wilson <[email protected]>: > Hi, > > Can old dirty pages purged from memory to make more room? Or only clean > old pages (pages that have already been written to disk by the periodical > check pointing) can be purged? > > If old dirty pages which has not been check-pointed can be purged, then it > means the purging process (in addition to check pointing) will write pages > to disk? > > Thanks, >
