In the historical view of Index Detail: Instance page of the Indexer DMC, it shows data for only _audit and _telemetry. No data for other indexes.
EDIT : There is no historical data shown on all of my splunk instances- 1 S.H, 1 Indexer and 2H.Fs. I have set their DMC's in standalone mode.
I learnt from here that the historical panels get data from introspection logs. Then I re-read the "Monitoring Console setup prerequisites" where it says,
Platform instrumentation must be enabled for every Splunk Enterprise instance that you intend to monitor, except forwarders. (that means Platform instrumentation must NOT be enabled on Forwarders)
Forward internal logs (both $SPLUNK_HOME/var/log/splunk and $SPLUNK_HOME/var/log/introspection) to indexers from all other components. (Forwarding internal logs from Search Head and Heavy Forwarders will basically make them also "Forwarders")
Does that mean I should disable Platform instrumentation on Search head and Heavy forwarders ?
And if I disable Platform instrumentation on these "forwarders" then it will not generate any introspection logs. Then what would be the sense in forwarding them to Indexer ?