Re: [I] help request: My APISIX is experiencing 100% CPU utilization and has become unresponsive [apisix]

["bzp2010 (via GitHub)" <gi...@apache.org>]

bzp2010 commented on issue #12275:
URL: https://github.com/apache/apisix/issues/12275#issuecomment-2930449507

   In principle, we do not provide support for older versions, especially for spans such as 2.x to 3.x. If the same issue cannot be reproduced on the master branch, it will basically not be addressed (or will be addressed with very low priority).
   Generally, you may need to build an independent test environment using the master code repository or at least the latest release version, and conduct testing there. If the issue is reproduced, you can report that it should be fixed.
   
   However, regarding the abnormal CPU consumption issue you mentioned caused by Prometheus, I have heard a little about it. This seems to be caused by some unexpected implementation or integration within the library, which is not easy to fix. The most economical and quick improvement is to first provide a larger shdict buffer.
   
   You are using an extremely outdated version. Since the version you are using, we have introduced some improvements to the plugin, such as a mechanism for evicting old data (in the old implementation, shdict keys did not have a TTL, which allowed data to accumulate indefinitely).
   Although abnormal CPU consumption may still occur if configured improperly (due to internal library details), the presence of shdict TTL can protect against most scenarios.
   
   If you cannot upgrade, you will not be able to benefit from these improvements. If they are necessary, you will need to explore how to backport them to your version on your own, but this essentially remains a customization and will not receive official support, so experience is required.


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