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WP-CLI's db check and db optimize commands can prevent silent WordPress database failures

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WordPress databases accumulate bloat over time through spam comments, expired transients, post revisions, and orphaned plugin tables, which can cause corruption and performance issues. WP-CLI's wp db check command runs a MySQL health scan on every database table, helping catch corruption before it causes visible site errors. The wp db optimize command defragments tables and reclaims disk space from deleted rows, with behavior varying depending on whether the storage engine is InnoDB or the older MyISAM. Both commands are best run during low-traffic periods, and are especially useful after bulk deletions, before major updates, or as part of routine maintenance. If wp db check reveals corruption, wp db repair is available as a recovery step, though a fresh backup should always be taken before attempting any repair.

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WP-CLI's db check and db optimize commands can prevent silent WordPress database failures · ShortSingh