Jie Huang created ZOOKEEPER-3245:
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Summary: Add useful metrics for ZK pipeline and request/server
states
Key: ZOOKEEPER-3245
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-3245
Project: ZooKeeper
Issue Type: Improvement
Reporter: Jie Huang
Fix For: 3.6.0
Add metrics to track time spent in the commit processor, watch counts and fire
rates, how long a Zookeeper server is unavailable between elections, quorum
packet size and time spent in the queue, aggregate request states/flow, request
throttle, sync processor queue time, per-connection read and write request
counts, commit processor queue sizes(read/write/commit), final request
processor read/write times, watch manager cnxn/path counts, latencies at
different points in pipeline for commits/informs, split up request type
counters for more request types, export sum metrics for all AvgMinMax counters,
per-connection watch fired counts, ack latency for each follower, percentile
metrics to zeus latency counters, proposal count, number of outstanding
changes, snapshot and txns loading time during startup, number of non-voting
followers, leader unavailable time, etc.
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