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system time

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Efficient Ops

Dec 11, 2023 · Operations

How a Simple System‑Time Change Sparked a Massive Outage

A junior ops engineer mistakenly set the production server clock ahead by a year, causing thousands of user accounts to expire, triggering a large‑scale outage, emergency fixes, financial loss, and harsh career consequences, while highlighting the need for proper permission and change management.

OperationsPermissionsdatabase

0 likes · 7 min read

How a Simple System‑Time Change Sparked a Massive Outage

Aikesheng Open Source Community

Oct 29, 2021 · Databases

Impact of Adjusting System Time on MySQL Runtime Behavior

The article investigates how changing the operating system clock while MySQL is running influences functions such as SLEEP, metadata lock (MDL) wait calculations, and other timing‑related mechanisms, demonstrating that forward or backward adjustments can cause premature exits or inaccurate wait measurements.

Database PerformanceMySQLlock_wait_timeout

0 likes · 4 min read

Impact of Adjusting System Time on MySQL Runtime Behavior