mysql.innodb.buffer_pool_wait_free
When InnoDB needs to read or create a page and no clean pages are available, InnoDB flushes some dirty pages first and waits for that operation to finish. This counter counts instances of these waits.Dimensions:None
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InnoDB Checkpoint Stallcritical
InnoDB checkpointing cannot keep pace with write workload, causing log files to fill and write stalls. Occurs when innodb_io_capacity is too low, storage IOPS insufficient, or during sustained high write load. Manifests as periodic write latency spikes.
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