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Documenting MergeTree's ttl_only_drop_parts setting, and updating reference to it.

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kellytoole 2024-11-18 15:06:08 -08:00
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2 changed files with 11 additions and 2 deletions
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docs/en/engines/table-engines/mergetree-family/mergetree.md
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@ -684,8 +684,7 @@ If you perform the `SELECT` query between merges, you may get expired data. To a
**See Also**
- [ttl_only_drop_parts](/docs/en/operations/settings/settings.md/#ttl_only_drop_parts) setting
- [ttl_only_drop_parts](/docs/en/operations/settings/merge-tree-settings#ttl_only_drop_parts) setting
## Disk types

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docs/en/operations/settings/merge-tree-settings.md
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@ -78,6 +78,16 @@ If `min_merge_bytes_to_use_direct_io = 0`, then direct I/O is disabled.
Default value: `10 * 1024 * 1024 * 1024` bytes.
## ttl_only_drop_parts
Controls whether data parts are fully dropped in MergeTree tables when all rows in that part have expired according to their `TTL` settings.
When `ttl_only_drop_parts` is disabled (by default), only the rows that have expired based on their TTL settings are removed.
When `ttl_only_drop_parts` is enabled, the entire part is dropped if all rows in that part have expired according to their `TTL` settings.
Default value: 0.
## merge_with_ttl_timeout
Minimum delay in seconds before repeating a merge with delete TTL.