Support query backoff detail in SLOW_QUERY

[crazycs520]

Background

#13770 records the backoff detail in slow log, such as below:

# Cop_backoff_regionMiss_total_times: 200 Cop_backoff_regionMiss_total_time: 0.2 Cop_backoff_regionMiss_max_time: 0.2 Cop_backoff_regionMiss_max_addr: 127.0.0.1 Cop_backoff_regionMiss_avg_time: 0.2 Cop_backoff_regionMiss_p90_time: 0.2
# Cop_backoff_rpcPD_total_times: 200 Cop_backoff_rpcPD_total_time: 0.2 Cop_backoff_rpcPD_max_time: 0.2 Cop_backoff_rpcPD_max_addr: 127.0.0.1 Cop_backoff_rpcPD_avg_time: 0.2 Cop_backoff_rpcPD_p90_time: 0.2
# Cop_backoff_rpcTiKV_total_times: 200 Cop_backoff_rpcTiKV_total_time: 0.2 Cop_backoff_rpcTiKV_max_time: 0.2 Cop_backoff_rpcTiKV_max_addr: 127.0.0.1 Cop_backoff_rpcTiKV_avg_time: 0.2 Cop_backoff_rpcTiKV_p90_time: 0.2

But I can't query this backoff-detail from SLOW_QUERY/CLUSTER_SLOW_QUERY.

Task

Maybe we can add a Backoff_detail column, the type can be varchar(4096), then we can store the backoff detail in this column.

[crazycs520]

@jyz0309 PTAL

[jyz0309]

/pick-up

[ti-challenge-bot]

It is not a pickable issue!

More

Tip : If you want this issue to be picked, you need to add a challenge-program label to it.

Warning: None