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Why Does Memory Usage Decrease After Big Key Analysis Is Performed on Redis?
Updated on 2023-09-28 GMT+08:00
Why Does Memory Usage Decrease After Big Key Analysis Is Performed on Redis?
Big key analysis only queries keys that occupy a large space and does not delete the keys. Due to the lazy free deletion mechanism, keys are not deleted immediately upon expiration, unless they are accessed or identified. During a big key analysis, all keys are traversed, and the expired keys will be identified and then deleted. As a result, memory usage decreases after a big key analysis is completed.
For details about how expired keys are deleted and how to scan for expired keys, see Scanning Expired Keys.
Parent topic: Big/Hot Key Analysis
Big/Hot Key Analysis FAQs
- What Are Big Keys and Hot Keys?
- What Is the Impact of Big Keys or Hot Keys?
- How Do I Avoid Big Keys and Hot Keys?
- How Do I Detect Big Keys and Hot Keys in Advance?
- How Does DCS Delete Expired Keys?
- How Long Are Keys Stored? How Do I Set Key Expiration?
- Why Does Memory Usage Decrease After Big Key Analysis Is Performed on Redis?
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