The MongoDB server uses the lookaside score statistic to make decisions about how much cache pressure is being generated by the required history window.
There are cases where the lookaside score doesn't respond as expected to changes in behavior. We should investigate how to improve lookaside score tracking and the corresponding statistic.
- is duplicated by
SERVER-41472 Create a workload to demonstrate the MongoDB usage difficulties of the WT WT_STAT_CONN_CACHE_LOOKASIDE_SCORE stat
- is related to
SERVER-41244 The WT inMemory storage engine needs an alternative metric to determine cache pressure for the snapshot window size controls