weizuo93 opened a new pull request #4998: URL: https://github.com/apache/incubator-doris/pull/4998
## Proposed changes The rows deleted by `delete operation` will not be deleted from the disk untill base compaction for the relevant tablet is performed. The data deleted logically not only occupies disk space, but also has an effects on scan performance. So it is necessary to perform compaction task for the tablet that contains a lot of deleted rows. For a tablet, we can record the filtered rows during scan operation since last base compaction, and take the filtered rows as a consideration factor when selecting a tablet for compaction task. ## Types of changes What types of changes does your code introduce to Doris? _Put an `x` in the boxes that apply_ - [] Bugfix (non-breaking change which fixes an issue) - [x] New feature (non-breaking change which adds functionality) - [] Breaking change (fix or feature that would cause existing functionality to not work as expected) - [] Documentation Update (if none of the other choices apply) - [x] Code refactor (Modify the code structure, format the code, etc...) ## Checklist _Put an `x` in the boxes that apply. You can also fill these out after creating the PR. If you're unsure about any of them, don't hesitate to ask. We're here to help! This is simply a reminder of what we are going to look for before merging your code._ - [x] I have create an issue on (Fix #4997), and have described the bug/feature there in detail - [x] Compiling and unit tests pass locally with my changes - [] I have added tests that prove my fix is effective or that my feature works - [x] If this change need a document change, I have updated the document - [x] Any dependent changes have been merged ---------------------------------------------------------------- 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 --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@doris.apache.org For additional commands, e-mail: commits-h...@doris.apache.org
