sql: lease acquisition of OFFLINE descs may starve bulk operations#62959
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craig[bot] merged 1 commit intocockroachdb:masterfrom Apr 1, 2021
Merged
sql: lease acquisition of OFFLINE descs may starve bulk operations#62959craig[bot] merged 1 commit intocockroachdb:masterfrom
craig[bot] merged 1 commit intocockroachdb:masterfrom
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Reviewed 4 of 5 files at r1.
Reviewable status:complete! 1 of 0 LGTMs obtained (waiting on @fqazi and @pbardea)
pkg/sql/catalog/lease/lease.go, line 1418 at r1 (raw file):
err2 := m.Release(desc) if err2 != nil {
nit: I'd prefere releaseErr to err2
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Fixes: cockroachdb#61798 Previously, offline descriptors would never have their leases cached and they would be released once the reference count hit zero. This was inadequate because when attempting to online these tables again the lease acquisition could be pushed back by other operations, leading to starvation / live locks. To address this, this patch will allow the leases of offline descriptors to be cached. Release note (bug fix): Lease acquisitions of descriptor in a offline state may starve out bulk operations (backup / restore)
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this one may need a backport on the 21.1 branch as well |
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Fixes: #61798
Previously, offline descriptors would never have their leases
cached and they would be released once the reference count hit zero.
This was inadequate because when attempting to online these tables
again the lease acquisition could be pushed back by other operations,
leading to starvation / live locks. To address this, this patch will
allow the leases of offline descriptors to be cached.
Release note (bug fix): Lease acquisitions of descriptor in a
offline state may starve out bulk operations (backup / restore)