Flowcharts & Processes

Optimistic Concurrency Control Without Heavy Locks

Flowcharts & Algorithms diagram · made in Skemio

Flowchart showing optimistic locking: read version, compute update, execute conditional update, verify affected rows, and retry.
Flowchart showing optimistic locking: read version, compute update, execute conditional update, verify affected rows, and retry.
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What it shows

  • Avoids database read locks by validating version numbers during updates.
  • Yields maximum throughput when read traffic vastly outnumbers writes.
  • Fails fast or retries automatically when conflicting writes touch a row.

The takeaway

Optimistic locking moves collision checks from lock waiting to atomic update predicates.

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