Optimize log content, log file management, etc

[scsldb]

Description

Optimize log content, log file management, etc. including:

• P0: Optimize region unavaible logs to show problematic region_id and store_id.
• P0: Optimize contents of PD expansion operation log.
• P0: Improve the content of slow log.
• P0: Record the error message of session level: 9005 region is unavailable.
• P0: Optimize explain analyze output information.
• P1: Support pt-query-digest tool to analyze slow query logs.
• P1: Show analyze status supports output of global information.
• P1: Optimize System log, including format、split、rotate、Archiving strategy.
• P1: Unify the log format of all components.

Category

Feature、Usability

Value

Improve system security