mysql.innodb.data_writes

InnoDB's doublewrite buffer causes additional write operations that can saturate provisioned IOPS and increase latency. Each 16KB page write to data files requires a prior write to the doublewrite buffer, creating overhead that scales with write-heavy workloads.

Storage I/O capacity exhausted by high write workload. Write operations queue waiting for disk, causing latency increases and potential transaction timeouts. Often occurs during batch updates, bulk inserts, or when storage IOPS provisioning is insufficient.