Fix Ingester Query Latency Spikes #461
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What this PR does:
Reduces the locking range on the block mutex during an active traces flush. This significantly improves Ingester query latency:
I was surprised to not immediately see similar improvement at the query frontend. However, I did find that the impact of querier scaling is now much more apparent with the ingester fix:
First annotation is the new ingester being deployed. Second annotation is scaling the queriers to 10.
Checklist
CHANGELOG.mdupdated - the order of entries should be[CHANGE],[FEATURE],[ENHANCEMENT],[BUGFIX]