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* prefer relative links from root * wip * split aggregate function reference * split system tables
20 lines
1.1 KiB
Markdown
20 lines
1.1 KiB
Markdown
# system.merges {#system-merges}
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Contains information about merges and part mutations currently in process for tables in the MergeTree family.
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Columns:
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- `database` (String) — The name of the database the table is in.
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- `table` (String) — Table name.
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- `elapsed` (Float64) — The time elapsed (in seconds) since the merge started.
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- `progress` (Float64) — The percentage of completed work from 0 to 1.
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- `num_parts` (UInt64) — The number of pieces to be merged.
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- `result_part_name` (String) — The name of the part that will be formed as the result of merging.
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- `is_mutation` (UInt8) - 1 if this process is a part mutation.
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- `total_size_bytes_compressed` (UInt64) — The total size of the compressed data in the merged chunks.
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- `total_size_marks` (UInt64) — The total number of marks in the merged parts.
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- `bytes_read_uncompressed` (UInt64) — Number of bytes read, uncompressed.
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- `rows_read` (UInt64) — Number of rows read.
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- `bytes_written_uncompressed` (UInt64) — Number of bytes written, uncompressed.
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- `rows_written` (UInt64) — Number of rows written.
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