Align tenant pruning according to wall clock #7299
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Pruning a tenant currently acquires a lock on the tenant's TSDB, which blocks reads from incoming queries. We have noticed spikes in query latency when tenants get decomissioned since each receiver will prune the tenant at a different time. To reduce the window where queries get degraded, this commit makes sure that pruning happens at predictable intervals by aligning it to the wall clock, similar to how head compaction is aligned. The commit also changes the tenant deletion condition to look at the duration from the min time of the tenant, rather than from the last append time. Signed-off-by: Filip Petkovski <filip.petkovsky@gmail.com>
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Signed-off-by: Filip Petkovski <filip.petkovsky@gmail.com>
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pedro-stanaka
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Apr 23, 2024
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Pruning a tenant currently acquires a lock on the tenant's TSDB, which blocks reads from incoming queries. We have noticed spikes in query latency when tenants get decomissioned since each receiver will prune the tenant at a different time.
To reduce the window where queries get degraded, this commit makes sure that pruning happens at predictable intervals by aligning it to the wall clock, similar to how head compaction is aligned.
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