xujl930 opened a new issue #3276:
URL: https://github.com/apache/apisix/issues/3276
### Issue description
I got some response of error code 503 from Apisix when benchmark with
ab，however，i have set rate to 10k per second. I run ab -n 100 -c 10, it
returned out about a half 503 response. is there any wrong configuration
caused the result?
### Environment
* apisix version (cmd: `apisix version`): docker image:
apache/apisix:2.2-alpine
* apsix-dashboard: docker image: apache/apisix-dashboard:2.3
* OS: (cmd: `uname -a`): macOS Big Sur 11.1
* OpenResty / Nginx version: (cmd: `nginx -V` or `openresty -V`):
openresty/1.19.3.1
### Minimal test code / Steps to reproduce the issue
1. run apisix and apisix-dashboard,add a global limit req plugin with
configuration
```
{
"burst": 0,
"disable": false,
"key": "remote_addr",
"rate": 100000,
"rejected_code": 503
}
```
2. add a upstream server, a route point to the upstream server
3. use ab with command like
```
ab -n 100 -c 10 http://127.0.0.1:9080/<your-route-url>
```
### What's the actual result? (including assertion message & call stack if
applicable)
### What's the expected result?
it should return all response with 200 code
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