nodetool setcompactionthreshold

Sets minimum and maximum compaction thresholds for a table.

SSTables are compacted concurrently to avoid wasting memory or running out of memory when compacting highly overlapping SSTables.

The max_threshold table property sets an upper bound on the number of SSTables that may be compacted in a single minor compaction, as described in How is data updated?.

Synopsis

nodetool [<connection_options>] setcompactionthreshold
[--] <keyspace_name> <table_name> <minthreshold> <maxthreshold>
Syntax legend
Syntax conventions Description

Italic, bold, or < >

Syntax diagrams and code samples use one or more of these styles to mark placeholders for variable values. Replace placeholders with a valid option or your own user-defined value.

In CQL statements, angle brackets are required to enclose data types in a set, list, map, or tuple. Separate the data types with a comma. For example: <datatype2

In Search CQL statements, angle brackets are used to identify the entity and literal value to overwrite the XML element in the schema and solrconfig files, such as @<xml_entity>='<xml_entity_type>'.

[ ]

Square brackets surround optional command arguments. Do not type the square brackets.

( )

Parentheses identify a group to choose from. Do not type the parentheses.

|

A pipe separates alternative elements. Type any one of the elements. Do not type the pipe.

...

Indicates that you can repeat the syntax element as often as required.

'

Single quotation marks must surround literal strings in CQL statements. Use single quotation marks to preserve upper case. + For Search CQL only: Single quotation marks surround an entire XML schema declaration, such as '<<schema> ... </schema>>'

{ }

Map collection. Curly braces enclose maps ({ <key_datatype>:<value_datatype> }) or key value pairs ({ <key>:<value> }). A colon separates the key and the value.

;

Ends a CQL statement.

--

Separate command line options from command arguments with two hyphens. This syntax is useful when arguments might be mistaken for command line options.

Options

If an option has a short and long form, both forms are given, separated by a comma.

-h, --host hostname

The hostname or IP address of a remote node or nodes. When omitted, the default is the local machine.

-p, --port jmx_port

The JMX port number.

-pw, --password jmxpassword

The JMX password for authenticating with secure JMX. If a password is not provided, you are prompted to enter one.

-pwf, --password-file jmx_password_filepath

The filepath to the file that stores JMX authentication credentials.

-u, --username jmx_username

The username for authenticating with secure JMX.

keyspace_name

The keyspace name.

maxthreshold

Resets or overrides internal setting of 32. How many SSTables of a similar size must be present before a minor compaction is scheduled.

minthreshold

Minimum threshold.

table_name

The table name.

Examples

Set minimum compaction throttling

nodetool setcompactionthreshold cycling comments 6 28

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