[jira] [Created] (IGNITE-28085) Add metric indicating that page eviction has started due to DataRegion memory pressure

["Oleg Valuyskiy (Jira)" <ji...@apache.org>]

Oleg Valuyskiy created IGNITE-28085:
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             Summary: Add metric indicating that page eviction has started due to DataRegion memory pressure
                 Key: IGNITE-28085
                 URL: https://issues.apache.org/jira/browse/IGNITE-28085
             Project: Ignite
          Issue Type: Bug
            Reporter: Oleg Valuyskiy
            Assignee: Oleg Valuyskiy


h1. Description

In in-memory clusters, when a data region reaches its {*}maxSize{*}, Ignite starts page-based eviction. At the moment this condition can only be observed in logs via the following warning:

 
{code:java}
Page-based evictions started. Consider increasing 'maxSize' on Data Region configuration{code}
 

(this message is logged from {*}IgniteCacheDatabaseSharedManager#warnFirstEvict{*}).

However, there is no metric indicating such conditions, which makes it difficult to monitor eviction pressure using monitoring systems.
h1. Proposed change

Introduce a new boolean metric that becomes true when page eviction is triggered due to data region memory pressure.



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