sdd-el opened a new issue, #11680:
URL: https://github.com/apache/apisix/issues/11680
### Description
**Current behavior**:
After running stress tests, memory usage increases and doesn’t decrease
after the tests are finished (unlike CPU usage, which decreases as expected).
The configured resources are:
resources:
limits:
cpu: 2000m
memory: 5Gi
requests:
cpu: 1500m
memory: 4Gi
The minimum replicas are set to 1, and the maximum replicas are set to 3.
The plugins in use are proxy-rewrite, serverless-pre-function, loki-logger, and
prometheus.
Any idea what could be causing this? Why isn’t memory being “cleaned” after
the traffic load is gone?

**Expected behavior:** Memory usage should decrease after the traffic load
is gone, similar to how CPU usage decreases.
### Environment
- APISIX version: 3.9.1-debian
- Operating system (run `uname -a`):
- OpenResty / Nginx version (run `openresty -V` or `nginx -V`): nginx
version: openresty/1.25.3.1
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