Spill SharedTLog when there's more than one #2256
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When switching between spill_type or log_version, a new instance of a SharedTLog is created in the transaction log processes. If this is done in a saturated database, then doubling the amount of memory to hold mutations in memory can cause TLogs to be uncomfortably close to the 8GB OOM limit. Instead, we now thread which UID of a SharedTLog is active, and the other TLog spill out the majority of their mutations. This is a backport of apple#2213 (fef89aa) to release-6.2
etschannen
reviewed
Oct 17, 2019
In case it is set before we get to the onChange()
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When switching between spill_type or log_version, a new instance of a
SharedTLog is created in the transaction log processes. If this is done
in a saturated database, then doubling the amount of memory to hold
mutations in memory can cause TLogs to be uncomfortably close to the 8GB
OOM limit.
Instead, we now thread which UID of a SharedTLog is active, and the
other TLog spill out the majority of their mutations.
This is a backport of #2213 (fef89aa) to release-6.2
Once this merges, please ping me, as this PR and #2213 will conflict, and I should go handle the 6.2->master merge.