MergeTree tables settings

System table system.merge_tree_settings shows the globally set MergeTree settings. MergeTree settings can be set in the merge_tree section of the server config file, or specified for each MergeTree table individually in the SETTINGS clause of the CREATE TABLE statement. Example for customizing setting max_suspicious_broken_parts: Configure the default for all MergeTree tables in the server configuration file:

<merge_tree>
    <max_suspicious_broken_parts>5</max_suspicious_broken_parts>
</merge_tree>

Set for a particular table:

CREATE TABLE tab
(
    `A` Int64
)
ENGINE = MergeTree
ORDER BY tuple()
SETTINGS max_suspicious_broken_parts = 500;

Change the settings for a particular table using ALTER TABLE ... MODIFY SETTING:

ALTER TABLE tab MODIFY SETTING max_suspicious_broken_parts = 100;

-- reset to global default (value from system.merge_tree_settings)
ALTER TABLE tab RESET SETTING max_suspicious_broken_parts;

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MergeTree settings

Browse MergeTree table settings

​MergeTree settings

​Browse MergeTree table settings

MergeTree settings

Browse MergeTree table settings