Sluggish dashboard or Data Enrichment is Inconsistent

Behind the scenes, Matomo does a data-enrichment step to calculate the dashboard data, starting from the web traffic data. When this has errors there will be gaps in the data. Here is the deep explanation of everything that has to go correctly for the data to be correct: https://developer.matomo.org/guides/how-piwik-works

Here are 3 separate tactics for your troubleshooting:

#1
This is an important strategy. It might help your data: https://matomo.org/faq/on-premise/how-to-set-up-auto-archiving-of-your-reports/ Unless your site is small, this step is important for making the data enrichment step reliable and consistent.

​#2
This is how to repair any hiccup or gap in the data.  98% of the time this happens on schedule. But if there is a gap or incorrect processing, this re-does it.
https://matomo.org/faq/how-to/faq_155/

​#3
​Please read all of the titles here. Some are likely to apply to your situation
​https://matomo.org/guide/installation-maintenance/matomo-on-premise-self-hosted/

Community help can be very specific (a good thing) and is best researched at our user forum. That is a free resource.

Because Matomo On-Premise is non-trivial to host, we offer the option of the On-Premise Support plan, where you get additional Matomo On-Premise technical and product support services. If you’re interested please visit the On-Premise Support Plans page to learn more.

If you are a Matomo Cloud Customer, your plan includes full support. Please send your emails to [email protected]. Matomo Cloud hosting starts at €19 / month for 50k hits: https://matomo.org/start-free-analytics-trial/?header