hanahmily opened a new pull request #5174: URL: https://github.com/apache/skywalking/pull/5174
Please answer these questions before submitting pull request - Why submit this pull request? - [ ] Bug fix - [x] New feature provided - [ ] Improve performance ___ ### New feature or improvement The labelFilter supports regular expression to filter labels. This feature provides a more flexible path for users to extract and aggregate metrics. For instance, `http_request_count` metric has a `status` label to indicate the status code. If users want to sum all of 4xx(400, 404 and etc) request, they can configure `4\d{2}` to match them. I don't intend to pre-compile the regular expression to improve the performance due to the low frequency of the Prometheus fetcher/receiver interval. Before some performance concerns are raised, I prefer to use cleaner and simpler implement. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org