[
https://issues.apache.org/jira/browse/KAFKA-3753?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Guozhang Wang resolved KAFKA-3753.
----------------------------------
Resolution: Fixed
This JIRA has been merged in as PR 1486.
> Add approximateNumEntries() to the StateStore interface for metrics reporting
> -----------------------------------------------------------------------------
>
> Key: KAFKA-3753
> URL: https://issues.apache.org/jira/browse/KAFKA-3753
> Project: Kafka
> Issue Type: Improvement
> Components: streams
> Reporter: Jeff Klukas
> Assignee: Jeff Klukas
> Priority: Minor
> Labels: api
> Fix For: 0.10.1.0
>
>
> As a developer building a Kafka Streams application, I'd like to have
> visibility into what's happening with my state stores. How can I know if a
> particular store is growing large? How can I know if a particular store is
> frequently needing to hit disk?
> I'm interested to know if there are existing mechanisms for extracting this
> information or if other people have thoughts on how we might approach this.
> I can't think of a way to provide metrics generically, so each state store
> implementation would likely need to handle this separately. Given that the
> default RocksDBStore will likely be the most-used, it would be a first target
> for adding metrics.
> I'd be interested in knowing the total number of entries in the store, the
> total size on disk and in memory, rates of gets and puts, and hit/miss ratio
> for the MemoryLRUCache. Some of these numbers are likely calculable through
> the RocksDB API, others may simply not be accessible.
> Would there be value to the wider community in having state stores register
> metrics?
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
