pingcap/tidb

Add SQL diagnosis rule: check the storage.block-cache.capacity value

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#17,925 opened on 2020年6月10日

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good first issuehelp wantedtype/enhancement

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説明

Introduce

The problem of https://github.com/pingcap/tidb/issues/17434 is the storage.block-cache.capacity config value too small.

Task

Add diagnose rule such as : ifstorage.block-cache.capacity < 0.1 * total_server_memory / tikv_count_in_server is true, then append an warning in INSPECTION_RESULT table.

Refer

  • You can query the cluster_config table to get the related config value.
  • You can refer the configInspection implementation in TiDB.

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