nodetool compactionstats
Prints statistics about compactions.
Synopsis
nodetool [<connection_options>] compactionstats
[-A][-H]
Syntax conventions | Description |
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UPPERCASE |
Literal keyword. |
Lowercase |
Not literal. |
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Variable value. Replace with a valid option or user-defined value. |
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Optional.
Square brackets ( |
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Group.
Parentheses ( |
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Or.
A vertical bar ( |
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Repeatable.
An ellipsis ( |
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Single quotation ( |
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Map collection.
Braces ( |
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Set, list, map, or tuple.
Angle brackets ( |
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End CQL statement.
A semicolon ( |
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Separate the command line options from the command arguments with two hyphens ( |
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Search CQL only: Single quotation marks ( |
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Search CQL only: Identify the entity and literal value to overwrite the XML element in the schema and solrconfig files. |
Definition
The short- and long-form options are comma-separated.
Connection options
- -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
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The username for authenticating with secure JMX.
Command arguments
- -A, --all
-
Displays additional details about the compactions that are in process. Use this option to view the complete status of each compaction request.
- -H, --human-readable
-
Display bytes in human readable form: KiB (kibibyte), MiB (mebibyte), GiB (gibibyte), TiB (tebibyte).
Examples
Get information about compaction
The total
column shows the total number of uncompressed bytes of SSTables being compacted.
To see the names of the compacted SSTables, open the system log.
nodetool compactionstats
pending tasks: 5
compaction type keyspace table completed total unit progress
Compaction Keyspace1 Standard1 282310680 302170540 bytes 93.43%
Compaction Keyspace1 Standard1 58457931 307520780 bytes 19.01%
Active compaction remaining time : 0h00m16s
Display additional details about compaction
Use the -A
option to display additional details about the compactions that are in process and the structure of the compaction hierarchy:
-
Level information for UnifiedCompactionStrategy (UCS)
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Level information for LeveledCompactionStrategy (LCS)
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Bucket information for SizeTieredCompactionStrategy (STCS)
-
Time windows for TimeWindowCompactionStrategy (TWCS)
The output also displays which buckets perform the compactions.
nodetool compactionstats -A
Example output:
pending tasks: 1
write amplification: 1.54
- keyspace1.standard1: 1
- keyspace1.standard1 write amplification.: 1.54
id compaction type keyspace table completed total unit progress description
ef70ca50-70ea-11f0-a4a9-fb43b54238a8 Compaction keyspace1 standard1 0 72136992 bytes 0.00%
Active compaction remaining time : 0h00m04s
Aggregated view:
keyspace1.standard1/UnifiedCompactionStrategy
Shard/Unrepaired-shard_0
Bucket W T F min size max size Tot. SSTables Tot. size (bytes) Compactions Comp. SSTables Read (bytes/sec) Write (bytes/sec) Tot. comp. size/Read/Written (bytes)
0 -8 2 10 0.000KiB 20.020MiB 2 61.925MiB 1/1 2/2 0.000KiB/s 6.515MiB/s 68.795MiB/0.000KiB/2.421MiB