k e t h e f ol l ow i n g: $ idris ____ __ _ / _/___/ /____(_)____ / // __ / ___/ / ___/ Version 0.99 _/ // /_/ / / / (__ ) http://www.idris-lang.org/ /___/\__,_/_/ /_/____/ Type :? for help Idris> l e c h an ge s . $ idris hello.idr ____ __ _ / _/___/ /____(_)____ / // __ / ___/ / ___/ Version 0.99 _/ // /_/ / / / (__ ) http://www.idris-lang.org/ /___/\__,_/_/ /_/____/ Type :? for help Type checking on m e n t i s : $ idris interp.idr ____ __ _ / _/___/ /____(_)____ / // __ / ___/ / ___/ Version 0.99 _/ // /_/ / / / (__ ) http://www.idris-lang.org/ /___/\__,_/_/ /_/____/ Type :? for help Type checking

ime query_time,, 0.95 0.95)),, percentile_approx percentile_approx((query_time query_time,, 0.99 0.99)) from from tbl tbl limit limit 10 10;; ++---------------------------------------+-------- query_time``,, 0.95 0.95)) || percentile_approx percentile_approx((``query_time query_time``,, 0.99 0.99)) || ++---------------------------------------+---------------------------------------+ ----- mysql>> select select ``table table``,, percentile_approx percentile_approx((cost_time cost_time,,0.99 0.99)) from from log_statis log_statis group group by by ``table table``;; ++-----------------

troubleshoot the goroutine leak issue. 7.5.1.3.2 TiDB_query_duration • Alert rule: histogram_quantile(0.99, sum(rate(tidb_server_handle_query_duration_seconds_bucket �→ [1m]))BY (le, instance))> 1 • Description: Critical-level alerts 340 7.5.2.2.1 PD_etcd_write_disk_latency • Alert rule: histogram_quantile(0.99, sum(rate(etcd_disk_wal_fsync_duration_seconds_bucket �→ [1m]))by (instance, job, le))> 1 • Description: leads to downtime. 342 7.5.2.3.3 PD_etcd_network_peer_latency • Alert rule: histogram_quantile(0.99, sum(rate(etcd_network_peer_round_trip_time_seconds_bucket �→ [1m]))by (To, instance, job, le))> 1

troubleshoot the goroutine leak issue. 7.5.1.3.2 TiDB_query_duration • Alert rule: histogram_quantile(0.99, sum(rate(tidb_server_handle_query_duration_seconds_bucket �→ [1m]))BY (le, instance))> 1 • Description: Critical-level alerts 371 7.5.2.2.1 PD_etcd_write_disk_latency • Alert rule: histogram_quantile(0.99, sum(rate(etcd_disk_wal_fsync_duration_seconds_bucket �→ [1m]))by (instance, job, le))> 1 • Description: leads to downtime. 373 7.5.2.3.3 PD_etcd_network_peer_latency • Alert rule: histogram_quantile(0.99, sum(rate(etcd_network_peer_round_trip_time_seconds_bucket �→ [1m]))by (To, instance, job, le))> 1

troubleshoot the goroutine leak issue. 7.5.1.3.2 TiDB_query_duration • Alert rule: histogram_quantile(0.99, sum(rate(tidb_server_handle_query_duration_seconds_bucket �→ [1m]))BY (le, instance))> 1 • Description: Critical-level alerts 354 7.5.2.2.1 PD_etcd_write_disk_latency • Alert rule: histogram_quantile(0.99, sum(rate(etcd_disk_wal_fsync_duration_seconds_bucket �→ [1m]))by (instance, job, le))> 1 • Description: leads to downtime. 356 7.5.2.3.3 PD_etcd_network_peer_latency • Alert rule: histogram_quantile(0.99, sum(rate(etcd_network_peer_round_trip_time_seconds_bucket �→ [1m]))by (To, instance, job, le))> 1

处理方法： 通过 HTTP API 来排查 goroutine 泄露的问题。 7.5.1.3.2 TiDB_query_duration • 报警规则： histogram_quantile(0.99, sum(rate(tidb_server_handle_query_duration_seconds_bucket[1m]))BY ( �→ le, instance))> 1 • 规则描述： TiKV/TiFlash 无法恢复，可做下线处理。 7.5.2.2 严重级别报警项 7.5.2.2.1 PD_etcd_write_disk_latency • 报警规则： histogram_quantile(0.99, sum(rate(etcd_disk_wal_fsync_duration_seconds_bucket[1m]))by ( �→ instance, job, le))> 1 • 规则描述： 无法释放空间时，可以考虑主动下线该节点，防止由于磁盘空间不足而宕机。 259 7.5.2.3.3 PD_etcd_network_peer_latency • 报警规则： histogram_quantile(0.99, sum(rate(etcd_network_peer_round_trip_time_seconds_bucket[1m]))by ( �→ To, instance, job, le))> 1

处理方法： 通过 HTTP API 来排查 goroutine 泄露的问题。 7.5.1.3.2 TiDB_query_duration • 报警规则： histogram_quantile(0.99, sum(rate(tidb_server_handle_query_duration_seconds_bucket[1m]))BY ( �→ le, instance))> 1 • 规则描述： TiKV/TiFlash 无法恢复，可做下线处理。 7.5.2.2 严重级别报警项 7.5.2.2.1 PD_etcd_write_disk_latency • 报警规则： histogram_quantile(0.99, sum(rate(etcd_disk_wal_fsync_duration_seconds_bucket[1m]))by ( �→ instance, job, le))> 1 • 规则描述： 无法释放空间时，可以考虑主动下线该节点，防止由于磁盘空间不足而宕机。 7.5.2.3.3 PD_etcd_network_peer_latency • 报警规则： histogram_quantile(0.99, sum(rate(etcd_network_peer_round_trip_time_seconds_bucket[1m]))by ( �→ To, instance, job, le))> 1

troubleshoot the goroutine leak issue. 7.5.1.3.2 TiDB_query_duration • Alert rule: histogram_quantile(0.99, sum(rate(tidb_server_handle_query_duration_seconds_bucket �→ [1m]))BY (le, instance))> 1 • Description: Critical-level alerts 465 7.5.2.2.1 PD_etcd_write_disk_latency • Alert rule: histogram_quantile(0.99, sum(rate(etcd_disk_wal_fsync_duration_seconds_bucket �→ [1m]))by (instance, job, le))> 1 • Description: that leads to downtime. 7.5.2.3.3 PD_etcd_network_peer_latency • Alert rule: histogram_quantile(0.99, sum(rate(etcd_network_peer_round_trip_time_seconds_bucket �→ [1m]))by (To, instance, job, le))> 1

处理方法： 通过 HTTP API 来排查 goroutine 泄露的问题。 7.5.1.3.2 TiDB_query_duration • 报警规则： histogram_quantile(0.99, sum(rate(tidb_server_handle_query_duration_seconds_bucket[1m]))BY ( �→ le, instance))> 1 • 规则描述： TiKV/TiFlash 无法恢复，可做下线处理。 7.5.2.2 严重级别报警项 7.5.2.2.1 PD_etcd_write_disk_latency • 报警规则： histogram_quantile(0.99, sum(rate(etcd_disk_wal_fsync_duration_seconds_bucket[1m]))by ( �→ instance, job, le))> 1 • 规则描述： 无法释放空间时，可以考虑主动下线该节点，防止由于磁盘空间不足而宕机。 272 7.5.2.3.3 PD_etcd_network_peer_latency • 报警规则： histogram_quantile(0.99, sum(rate(etcd_network_peer_round_trip_time_seconds_bucket[1m]))by ( �→ To, instance, job, le))> 1