fix: set correct number of keys in background cache metrics #2764
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Signed-off-by: Trevor Wood Trevor.G.Wood@gmail.com
What this PR does:
Currently, the number of keys in the background cache queue is incorrectly reported. Each batch of keys adds the total remaining keys to the queue length metric rather than the number of keys that were just added to the queue, which results in the queue appearing to grow infinitely in size without ever decreasing.
Which issue(s) this PR fixes:
N/A
Checklist
CHANGELOG.md
updated - the order of entries should be[CHANGE]
,[FEATURE]
,[ENHANCEMENT]
,[BUGFIX]