nodetool setcachecapacity
Sets global key and row cache capacities in megabytes. A value of 0 means that the cache is disabled.
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Overrides the configured value of the row_cache_size_in_mb parameter in cassandra.yaml. |
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To change the current setting, use nodetool getcachecapacity. |
Synopsis
nodetool [<connection_options>] setcachecapacity
[--] <key-cache-capacity> <row-cache-capacity> <counter-cache-capacity>Definition
The short- and long-form options are comma-separated.
Connection options
- -h, --host hostname
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The hostname or IP address of a remote node or nodes. When omitted, the default is the local machine.
- -p, --port jmx_port
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The JMX port number.
- -pw, --password jmxpassword
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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
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The filepath to the file that stores JMX authentication credentials.
- -u, --username jmx_username
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The username for authenticating with secure JMX.
Command arguments
- counter-cache-capacity
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Corresponds to the counter_cache_size_in_mb in the
cassandra.yamlfile.-
number - the number of keys saved by each cache
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0 - disable counter caching
Default: Smaller of minimum of 2.5% of heap or 50 MB.
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- key-cache-capacity
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Key cache capacity in MB units.
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number: the number of MB saved by each cache
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0: disable caching
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- row-cache-capacity
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Row cache capacity in MB units. Corresponds to the row_cache_size_in_mb parameter in
cassandra.yaml.-
number: The number of MB saved by each cache
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0: Disable caching
Default: 0 (disabled).
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Examples
Set the global key to 200 MB, row cache to 50 MB, and counter cache to 25 MB capacities
nodetool setcachecapacity 200 0 25Ensure capacities were updated.
nodetool getcachecapacityResults:
Key cache capacity: 200 MB
Row cache capacity: 0 MB
Counter cache capacity: 25 MB