Stackdriver / stackdriver-prometheus-sidecar

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Build # 470

Build Type

push

travis-ci-com

Committed by web-flow

Commit Message

Fix hash value for Prometheus histogram metrics. (#175)

Through internal investigation, I observed that one of the queue length
is consistently high and blocked the whole queue manager. I identified
that there are large volume of points with hash value 0 tried to be
enqueued on to shard #0, which makes the sharding inbalance and the
sharded queue are constantly blocked by shard #0.

When Stackdriver Prometheus Sidecar tries to transform Prometheus
histogram metrics into Stackdriver timeseries with value type
distribution, it should return the hash values derived by series cache
rather than 0. This change fixes the undesired behavior.

Run Details

11 of 11 new or added lines in 1 file covered. (100.0%)

1565 of 2419 relevant lines covered (64.7%)

0.72 hits per line