Cache Types 

When performing queries, ClichHouse uses different caches.

Main cache types:

  • mark_cache — Cache of marks used by table engines of the MergeTree family.
  • uncompressed_cache — Cache of uncompressed data used by table engines of the MergeTree family.

Additional cache types:

Indirectly used:

  • OS page cache.

To drop cache, use SYSTEM DROP ... CACHE statements.

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