Comparing two before/after snapshots
5 min read
Isolate the real impact of a deployment, a migration or a load spike by comparing two snapshots of your database.
Why compare two snapshots?
A single reading never tells you whether a value is normal or abnormal. By comparing a "before" snapshot and an "after" snapshot around a change (deployment, migration, traffic spike), you precisely isolate what changed.
PWR highlights the significant differences in slow queries, locks, cache hit ratio and CPU/IO consumption.
How to run a comparison
Select two existing reports from the history, then choose "Compare". PWR automatically aligns the common metrics and highlights regressions and improvements.
You can compare a normal day with an incident day, or a state before/after an index optimization.
Reading the results
Each gap is annotated with a severity indicator to help you prioritize actions: whatever degraded response times the most appears first.