THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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Current state: Under Discussion
Discussion thread:
JIRA:
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Please keep the discussion on the mailing list rather than commenting on the wiki (wiki discussions get unwieldy fast).
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Public Interfaces
New Metrics
| Name | Type | Scope | Description |
|---|---|---|---|
number-open-iterators | Value | stream-state-metrics | The current number of Iterators on the store that have been created, but not yet closed. |
iterator-duration-avg | Average | stream-state-metrics | The average time spent between creating an Iterator and closing it, in milliseconds. |
iterator-duration-total | Total | stream-state-metrics | The total time spent between creating Iterators and closing them, in milliseconds. |
Proposed Changes
The number-open-iterators metric will periodically record the difference between the NO_ITERATOR_CREATED and NO_ITERATOR_DELETED RocksDB Tickers. This value is likely to be non-zero in any application that heavily uses Iterators, even if they're being used properly and are not a performance concern. Users would want to monitor this metric and take action if:
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