最近涉及到数据中心的搬迁,所以打算等搬迁完成后再升级到3.0
这两天查询资料,参阅帖子与这个类似,业务无读写情况下,tikv负载仍然很高,磁盘IO也几乎达到瓶颈 - #2,来自 Kay-PingCAP
初步判断是因为region的调度导致。开启了region merge后,才出现的这个情况,但是上面的帖子是region到一定的程度后就恢复了,我的案例设置的如下参数
"max-merge-region-size": 50
"merge-schedule-limit": 6
"max-merge-region-keys":2000
目前也已经关闭。将"max-merge-region-size": 设置为0
但是region还在持续调度。。。。持续TIKV的磁盘高I/O,硬盘出问题的概率也很大,这个要怎么去优化,调整pd的设置?
目前的配置:
» config show
{
"max-snapshot-count": 3,
"max-pending-peer-count": 0,
"max-merge-region-size": 0,
"max-store-down-time": "30m0s",
"leader-schedule-limit": 6,
"region-schedule-limit": 6,
"replica-schedule-limit": 4,
"merge-schedule-limit": 6,
"tolerant-size-ratio": 2.5,
"schedulers-v2": [
{
"type": "balance-region",
"args": null
},
{
"type": "balance-leader",
"args": null
},
{
"type": "hot-region",
"args": null
},
{
"type": "label",
"args": null
}
]
}