The available memory of the machine suddenly dropped from 18G to 6.12G

[xue]

The available memory of the Kong(base openresty) machine suddenly dropped from 18G to 6.12G, and then recovered on its own. What are the possible reasons?

During this period, the number of requests did not increase, and other monitoring indicators were normal. Only the available memory of the machine fluctuated greatly.

[Junlong li]

You can use OpenResty XRay to compare the difference between memory at memory peaks and memory at memory lows.