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MySQL InnoDB Compression Details
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    • Compression level and failure rate threshold
    • Statistic of compression operations
    • CPU Core Usage
    • Buffer Pool Total

    MySQL InnoDB Compression Details¶

    !image

    This dashboard helps you analyze the efficiency of InnoDB compression.

    Compression level and failure rate threshold¶

    InnoDB Compression Level
    The level of zlib compression to use for InnoDB compressed tables and indexes.
    InnoDB Compression Failure Threshold
    The compression failure rate threshold for a table.
    Compression Failure Rate Threshold
    The maximum percentage that can be reserved as free space within each compressed page, allowing room to reorganize the data and modification log within the page when a compressed table or index is updated and the data might be recompressed.
    Write Pages to the Redo Log
    Specifies whether images of re-compressed pages are written to the redo log. Re-compression may occur when changes are made to compressed data.

    Statistic of compression operations¶

    Compress Attempts
    Number of compression operations attempted. Pages are compressed whenever an empty page is created or the space for the uncompressed modification log runs out.
    Uncompressed Attempts
    Number of uncompression operations performed. Compressed InnoDB pages are uncompressed whenever compression fails, or the first time a compressed page is accessed in the buffer pool and the uncompressed page does not exist.

    CPU Core Usage¶

    CPU Core Usage for Compression
    Shows the time in seconds spent by InnoDB Compression operations.
    CPU Core Usage for Uncompression
    Shows the time in seconds spent by InnoDB Uncompression operations.

    Buffer Pool Total¶

    Total Used Pages
    Shows the total amount of used compressed pages into the InnoDB Buffer Pool split by page size.
    Total Free Pages
    Shows the total amount of free compressed pages into the InnoDB Buffer Pool split by page size.

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    Last update: 2023-09-22
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