The configuration options “innodb_analyze_is_persistent”, “innodb_stats_persistent_sample_pages” and “innodb_stats_transient_sample_pages” provide improved accuracy of InnoDB index statistics, and consistency across MySQL restarts. InnoDB precomputes statistics that help the optimizer decide which indexes to use in a query, by sampling a portion of the index. You can adjust the amount of sampling that InnoDB does for each index. The resulting statistics can now persist across server restarts, rather than being recomputed (and possibly changing) due to restarts and some runtime events. The more accurate statistics can improve query performance, and the persistence aspect can keep query performance stable. When the persistent stats feature is enabled, the statistics are only recomputed when you explicitly run ANALYZE TABLE for the table.

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trilok sharma · Accepted Answer

The configuration options “innodb_analyze_is_persistent”, “innodb_stats_persistent_sample_pages” and “innodb_stats_transient_sample_pages” provide improved accuracy of InnoDB index statistics, and consistency across MySQL restarts. InnoDB precomputes statistics that help the optimizer decide which indexes to use in a query, by sampling a portion of the index. You can adjust the amount of sampling that InnoDB does for each index. The resulting statistics can now persist across server restarts, rather than being recomputed (and possibly changing) due to restarts and some runtime events. The more accurate statistics can improve query performance, and the persistence aspect can keep query performance stable. When the persistent stats feature is enabled, the statistics are only recomputed when you explicitly run ANALYZE TABLE for the table.

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