After switching traffic in TiDB cluster 5.3.1, the network card is fully utilized and memory OOM occurs

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This topic has been translated from a Chinese forum by GPT and might contain errors.

Original topic: tidb 集群5.3.1 切流后，tidb层网卡打满，内存OOM

| username: nuanhuang

Problem Background:
After migrating TiDB from version 4.0 to 5.0, we found that the memory on the TiDB layer was fully utilized, leading to an OOM (Out of Memory) error, and the network card was also fully utilized.

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| username: kkpeter | Original post link

The memory usage of TiDB v5.4.1 does seem to be higher than that of v4.

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| username: xiaohetao | Original post link

The more features, the higher the resource consumption. If it results in OOM (Out of Memory) when running business operations or when there aren’t many operations, I think it needs to be investigated.
What’s the machine configuration?

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| username: system | Original post link

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