tsdb: coalesce lock/unlock operations for append #9061
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Fetch the low watermark value under the same lock as we need for the appender, rather than releasing then re-aquiring a lock on the same Mutex. Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
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Jul 7, 2021
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Fetch the low watermark value under the same lock as we need for the appender, rather than releasing then re-aquiring a lock on the same Mutex.
Fixes #9059