release-21.2: multitenant: exempt sqlliveness operations from cost control#71123
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RaduBerinde merged 1 commit intorelease-21.2from Oct 7, 2021
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This change adds infrastructure to allow certain contexts to be exempt from cost control (meaning that we don't throttle or charge for them) and uses it to exempt sqlliveness operations - most importantly, the heartbeats, which are time-sensitive and necessary to keep the SQL session alive. Release note: None Release justification: Necessary fix for the distributed rate limiting functionality, which is vital for the upcoming Serverless MVP release. It allows CRDB to throttle clusters that have run out of free or paid request units (which measure CPU and I/O usage). This functionality is only enabled in multi-tenant scenarios and should have no impact on our dedicated customers.
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andy-kimball
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complete! 1 of 0 LGTMs obtained (waiting on @ajwerner and @knz)
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knz
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Backport 1/1 commits from #71038 on behalf of @RaduBerinde.
/cc @cockroachdb/release
This change adds infrastructure to allow certain contexts to be exempt
from cost control (meaning that we don't throttle or charge for them)
and uses it to exempt sqlliveness operations - most importantly, the
heartbeats, which are time-sensitive and necessary to keep the SQL
session alive.
Release note: None
Release justification: Necessary fix for the distributed rate limiting
functionality, which is vital for the upcoming Serverless MVP release.
It allows CRDB to throttle clusters that have run out of free or paid
request units (which measure CPU and I/O usage). This functionality is
only enabled in multi-tenant scenarios and should have no impact on
our dedicated customers.
Informs #68479.
Release justification: