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backport-2.1: server: add a configuration to enable GC of system.rangelog #31328

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backport-2.1: server: add a configuration to enable GC of system.rangelog #31328

wants to merge 3 commits into from

Commits on Oct 17, 2018

  1. server: add a configuration to enable GC of system.rangelog 

    system.rangelog table currently grows unboundedly. The rate of
growth is slow (as long as there is no replica rebalancing
thrashing), but it can still become a problem in long running
clusters.

This commit adds cluster settings to specify interval and TTL
for rows in system.rangelog.
By default, TTL of system.rangelog is set to 30 days, and that
for system.eventlog to 90 days.

Fixes cockroachdb#21260.

Release note (sql change): the range log and system events logs will
automatically purge records older than 30 and 90 days, respectively.
This can be adjusted via the server.rangelog.ttl and server.eventlog.ttl
cluster settings.
    @tbg
    tbg committed Oct 17, 2018
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  2. server: Avoid using txn timestamp in gc test 

    Using transaction timstamp can lead to flaky tests.
Use constant timestamps while inserting events in rangelog
gc test.

Fixes cockroachdb#31371.

Release note: None
    @tbg
    Vijay Karthik authored and tbg committed Oct 17, 2018
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  3. server: disable range/event log GC 

    It's too late in the cycle to have these on by default (in release-2.1),
but they're good to have in our back pockets.

Release note: None
    @tbg
    tbg committed Oct 17, 2018
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