3c82a8a2ff
This commit is a first step towards documenting system.* tables. It contains information about system.large_partitions table. References #3292
35 lines
770 B
Markdown
35 lines
770 B
Markdown
# System keyspace layout
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This section describes layouts and usage of system.* tables.
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## system.large\_partitions
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Large partition table can be used to trace largest partitions in a cluster.
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Schema:
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~~~
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CREATE TABLE large_partitions (
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keyspace_name text,
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table_name tex,
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sstable_name text,
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partition_size bigint,
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key text,
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compaction_time timestamp,
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PRIMARY KEY((keyspace_name, table_name), sstable_name, partition_size, key)
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) WITH CLUSTERING ORDER BY (partition_size DESC);
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~~~
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### Example usage
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#### Extracting large partitions info
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~~~
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SELECT * FROM system.large_partitions;
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~~~
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#### Extracting large partitions info for a single table
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~~~
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SELECT * FROM system.large_partitions WHERE sstable_name = 'ks1.standard1';
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~~~
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## TODO: the rest
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