# Monitoring Analysis (B)

+ Grafana Monitoring TiDB —>`Query Summary --> QPS`
  + QPS is generally stable, mostly read operations, and fewer writes


![left](./student-guide/diagram/03-06-1.png)

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It was determined that there was a problem with the database during this time, and continue to find out which operations were problematic. By monitoring this Grafana monitoring TiDB —> Query Summary is an overall statistic with QPS in it. QPS is a query volume per second. There are many reasons for this slowness, it may be some performance problems in the database, or it may be unstable. Check if there is a problem on the business side: QPS is very stable during the problem period, indicating that the business stability has not changed much. query, commits, inserts, etc. are very stable.

The top line in the figure represents total, reflecting the overall situation! Other lines are split for each, such as: query, insert, commit, etc.