OpenResty机器可用内存，突然由18G下降到6.12G

[xue]

Kong机器可用内存，突然由18G下降到6.12G，然后又自行恢复了。大概可能的原因有哪些？感谢。

这个期间，请求量也没有增加，其它监控指标都正常。只有机器可用内存波动很大。

The available memory of the Kong 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.

[xue]

像luajit table rehash的行为，但没有现场了。

hash到新的空间，GC旧的空间。

[Junlong li]

可以用   OpenResty XRay  看看在最高峰的时候是什么内存占用的。