[jira] [Commented] (SOLR-15572) Improve the default Prometheus exporter config performance

["Andrzej Bialecki (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SOLR-15572?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17392436#comment-17392436 ] 

Andrzej Bialecki commented on SOLR-15572:
-----------------------------------------

These are the equivalent expressions that select the metrics that the default config knows how to process:
{code:xml}
            <str name="expr">solr\.jetty:.*DefaultHandler.*</str>
            <str name="expr">solr\.jvm:.*</str>
            <str name="expr">solr\.overseer:.*</str>
            <str name="expr">solr\.core\..*:QUERY\..*</str>
            <str name="expr">solr\.core\..*:ADMIN\..*</str>
            <str name="expr">solr\.core\..*:CACHE\..*</str>
            <str name="expr">solr\.core\..*:UPDATE\.updateHandler\..*</str>
            <str name="expr">solr\.core\..*:CORE\.fs\..*</str>
            <str name="expr">solr\.core\..*:HIGHLIGHTER\..*</str>
            <str name="expr">solr\.core\..*:INDEX\..*</str>
            <str name="expr">solr\.core\..*:REPLICATION\.replication\..*</str>
            <str name="expr">solr\.core\..*:SEARCHER\.searcher\..*</str>
{code}
These metrics populate various panels in the default Grafana dashboard, but IMHO they are overkill for routine monitoring - OTOH they may be handy if you want to collect the history of these metrics for post-mortem analysis.

I'm open to suggestions how to modify this list - this change at least avoids exporting exotic metrics such as TLOG, and makes it much easier to trim down those that are not needed.

 

> Improve the default Prometheus exporter config performance
> ----------------------------------------------------------
>
>                 Key: SOLR-15572
>                 URL: https://issues.apache.org/jira/browse/SOLR-15572
>             Project: Solr
>          Issue Type: Improvement
>      Security Level: Public(Default Security Level. Issues are Public) 
>          Components: contrib - prometheus-exporter
>            Reporter: Andrzej Bialecki
>            Assignee: Andrzej Bialecki
>            Priority: Major
>
> Follow-up to SOLR-15564. Using {{expr}} parameters it's possible to very efficiently pick only the metrics we are interested in. This should drastically reduce the load on Solr nodes and on the exporter process.



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