pingcap/tidb

Add SQL diagnosis rule: threshold check for tikv_append_log_duration

Open

#17 941 ouverte le 11 juin 2020

Voir sur GitHub
 (0 commentaires) (0 réactions) (0 assignés)Go (6 186 forks)batch import
good first issuehelp wantedtype/enhancement

Métriques du dépôt

Stars
 (40 090 stars)
Métriques de merge PR
 (Merge moyen 14j 4h) (346 PRs mergées en 30 j)

Description

Development Task

When Raft append log duration, P99 Value > 500ms, then append an warning in INSPECTION_RESULT table, this may be caused by:

  • write disk too slow, check the disk latency.
  • It may trigger the RocksDB Write Stall.

Refer

  • You can query the tikv_append_log_duration table to get metrics_schema.tikv_append_log_duration value. Here is the related doc.
  • You can refer the thresholdCheckInspection implementation in TiDB.

If you have any questions or want to discuss something, you can chat in the sig-dashboard slack channel and @ chenshuang.

Guide contributeur