Baoyuantop commented on issue #13367:
URL: https://github.com/apache/apisix/issues/13367#issuecomment-4622996648
This warning is expected Nginx behavior, not necessarily an APISIX error.
`PUT /apisix/admin/configs` sends the full declarative configuration to
APISIX. When the request body is larger than Nginx's in-memory request body
buffer, Nginx buffers the body to a temporary file and logs:
`a client request body is buffered to a temporary file`
This does not mean the request failed. In your access logs, the Admin API
returned `202` and `204`:
- `202` means the new configuration was accepted.
- `204` means APISIX skipped the update because the digest/config was
unchanged.
Also note that `nginx_config.http.client_max_body_size: 0` only means APISIX
does not limit the maximum request body size. It does not mean all request
bodies are kept in memory. Whether the body is written to a temporary file is
controlled by Nginx request body buffering, especially
`client_body_buffer_size`.
If you only want to reduce this warning for large Admin API config sync
requests, you can increase the Admin API request body buffer size through the
Nginx admin snippet, for example:
```yaml
nginx_config:
http_admin_configuration_snippet: |
client_body_buffer_size 10m;
```
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