Creating Signoz Dashboard for GC Metrics
TLDR Div wanted to create a dashboard for GC events and metrics. Ankit and vishal-signoz provided help with Clickhouse queries and template variables.
Ankit
Mon, 08 May 2023 07:15:38 UTCDiv not sure about the 1st but 2nd should be doable in clickhouse query. BTW which language and framework are you using? They should expose GC related metrics too
Div
Mon, 08 May 2023 07:16:17 UTCi am using nestJS framework with Typescript
Ankit
Mon, 08 May 2023 08:41:56 UTCI see...nodejs runtime metrics like eventloop lag and GC metrics is still not merged
Ankit
Mon, 08 May 2023 08:42:14 UTCvishal-signoz can you help with the above queries in clickhouse?
vishal-signoz
Mon, 08 May 2023 11:48:19 UTCDiv Here’s a Query which returns avg time spent on a GC span. ```SELECT toStartOfInterval(timestamp, INTERVAL 60 SECOND) AS ts, avg(durationNano) as value from signoz_traces.distributed_signoz_index_v2 where timestamp between {{.start_datetime}} AND {{.end_datetime}} AND stringTagMap['gc_type']='GC' group by ts order by ts```
Ankit
Mon, 08 May 2023 12:11:29 UTCvishal-signoz we should replace `now() - INTERVAL 30 MINUTE` with template variables
Div
Mon, 08 May 2023 17:09:49 UTCcan you please share the template variable here, would help make the dashboard dynamic for us
vishal-signoz
Tue, 09 May 2023 04:46:19 UTCDiv Already updated the query with template variable:
vishal-signoz
Tue, 09 May 2023 04:47:08 UTCYou can follow this doc to learn more about template variables:
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Div
Mon, 08 May 2023 04:01:35 UTCHi Team, I have a trace filter as `gc_type.(string) IN "GC"` Which is showing all the traces for our GC Events in our node service, I want to add a dashboard for this on Signoz, with 2 main metrics, the time difference between 2 GCs and the time spent on a GC operation, can someone please help, should I write a Clickhouse query or Query Builder can do this for me ?