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https://issues.apache.org/jira/browse/SOLR-15059?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Timothy Potter updated SOLR-15059:
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Fix Version/s: master (9.0)
8.8
> Default Grafana dashboard needs to expose graphs for monitoring query
> performance
> ---------------------------------------------------------------------------------
>
> Key: SOLR-15059
> URL: https://issues.apache.org/jira/browse/SOLR-15059
> Project: Solr
> Issue Type: Improvement
> Security Level: Public(Default Security Level. Issues are Public)
> Components: Grafana Dashboard, metrics
> Reporter: Timothy Potter
> Assignee: Timothy Potter
> Priority: Major
> Fix For: 8.8, master (9.0)
>
>
> The default Grafana dashboard doesn't expose graphs for monitoring query
> performance. For instance, if I want to see QPS for a collection, that's not
> shown in the default dashboard. Same for quantiles like p95 query latency.
> After some digging, these metrics are available in the output from
> {{/admin/metrics}} but are not exported by the exporter.
> This PR proposes to enhance the default dashboard with a new Query Metrics
> section with the following metrics:
> * Distributed QPS per Collection (aggregated across all cores)
> * Distributed QPS per Solr Node (aggregated across all base_url)
> * QPS 1-min rate per core
> * QPS 5-min rate per core
> * Top-level Query latency p99, p95, p75
> * Local (non-distrib) query count per core (this is important for determining
> if there is unbalanced load)
> * Local (non-distrib) query rate per core (1-min)
> * Local (non-distrib) p95 per core
> Also, the {{solr-exporter-config.xml}} uses {{jq}} queries to pull metrics
> from the output from {{/admin/metrics}}. This file is huge and contains a
> bunch of {{jq}} boilerplate. Moreover, I'm introducing another 15-20 metrics
> in this PR, it only makes the file more verbose.
> Thus, I'm also introducing support for jq templates so as to reduce
> boilerplate, reduce syntax errors, and improve readability. For instance the
> query metrics I'm adding to the config look like this:
> {code}
> <str>
> $jq:core-query(1minRate, endswith(".distrib.requestTimes"))
> </str>
> <str>
> $jq:core-query(5minRate, endswith(".distrib.requestTimes"))
> </str>
> {code}
> Instead of duplicating the complicated {{jq}} query for each metric. The
> templates are optional and only should be used if a given jq structure is
> repeated 3 or more times. Otherwise, inlining the jq query is still supported.
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