Mark Gregory
9cd4a3c443
Previously, the progress bar updated only after completing an entire table. For large tables such as LIBARC, this could make the application appear to have stopped responding. Phase 10 updates the interface while rows are being exported.
1.1 KiB
1.1 KiB
Phase 25–26 — Performance sampling and diagnostics
- Samples the Slow Query Analysis, Connection Statistics, InnoDB Metrics, Dashboard, and Server Status screens on successful refresh.
View Trends…compares current and previous counter values, reporting changes per second when values are monotonic.- Tracks up to 60 snapshots per open administration screen in memory;
Clear Samplesremoves them. - Slow-query snapshots compare execution counts by Performance Schema SQL digest text.
- No new server privileges, schema modifications, third-party dependencies or external MySQL binaries.
Limitations
- Samples are not persisted, and are discarded when the screen is closed.
- Slow query analysis is limited to the top 100 digests returned by the existing SQL; digests dropping out of the top 100 will not be comparable.
- For cumulative counters, server restarts or Performance Schema resets can invalidate deltas; negative deltas are suppressed.
- A counter rate is not the same as query latency, and the SQL digest data may be truncated.
- Not compiled with Xcode or tested on a live MySQL server in this environment.