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【 TiDB 使用环境】
线上环境
【概述】
大量慢查询,p999非常大;
【背景】
扩容增加节点,之前的TiFlash节点摘除,pd-dashbord的lable显示不对,总共只有9个节点,已经有9个节点有lable了,但是还显示有一个节点lable unkown
【现象】
lable显示有问题,
leader raft 显示也有问题
【业务影响】
目前查询和写入都非常慢
【TiDB 版本】
v4.0.5
【附件】
- 相关日志 和 监控
-
TiUP Cluster Display 信息
-
TiUP Cluster Edit Config 信息
{
“replication”: {
“enable-placement-rules”: “false”,
“location-labels”: “zone,dc,rack,host”,
“max-replicas”: 3,
“strictly-match-label”: “false”
},
“schedule”: {
“enable-cross-table-merge”: “false”,
“enable-debug-metrics”: “false”,
“enable-location-replacement”: “true”,
“enable-make-up-replica”: “true”,
“enable-one-way-merge”: “false”,
“enable-remove-down-replica”: “true”,
“enable-remove-extra-replica”: “true”,
“enable-replace-offline-replica”: “true”,
“high-space-ratio”: 0.7,
“hot-region-cache-hits-threshold”: 3,
“hot-region-schedule-limit”: 4,
“leader-schedule-limit”: 4,
“leader-schedule-policy”: “count”,
“low-space-ratio”: 0.8,
“max-merge-region-keys”: 200000,
“max-merge-region-size”: 20,
“max-pending-peer-count”: 16,
“max-snapshot-count”: 3,
“max-store-down-time”: “30m0s”,
“merge-schedule-limit”: 8,
“patrol-region-interval”: “100ms”,
“region-schedule-limit”: 2048,
“replica-schedule-limit”: 64,
“scheduler-max-waiting-operator”: 5,
“split-merge-interval”: “1h0m0s”,
“store-limit-mode”: “manual”,
“tolerant-size-ratio”: 20
}
} -
TiDB- Overview 监控
tidb-4s-cluster-Overview_2021-09-08T12_48_05.893Z.json (1.8 MB)
- 对应模块日志(包含问题前后1小时日志)