[jira] [Created] (IGNITE-13886) Change units of cache-related histograms to milliseconds

[Anton Vinogradov (Jira)]

Denis Mekhanikov created IGNITE-13886:
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             Summary: Change units of cache-related histograms to milliseconds
                 Key: IGNITE-13886
                 URL: https://issues.apache.org/jira/browse/IGNITE-13886
             Project: Ignite
          Issue Type: Improvement
            Reporter: Denis Mekhanikov


Ignite has different metrics that have the "histogram" type:
 * tx.nodeSystemTimeHistogram
 * tx.nodeUserTimeHistogram
 * pme.DurationHistogram
 * pme.CacheOperationsBlockedDurationHistogram
 * cache.<cacheName>.GetTime
 * cache.<cacheName>.PutTime
 * cache.<cacheName>.RemoveTime
 * cache.<cacheName>.CommitTime
 * cache.<cacheName>.RollbackTime

First four have buckets corresponding to the amount of time the operation took in milliseconds.

Cache-related histograms are measured in nanoseconds, while it would be enough to use milliseconds there as well.

It's hard to distinguish between 100000000 and 1000000000 nanoseconds visually.

The following set of buckets should be used:
 * 1
 * 10
 * 100
 * 250
 * 1000

The values are provided in milliseconds.



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