jacktengg opened a new pull request, #9250: URL: https://github.com/apache/incubator-doris/pull/9250
# Proposed changes 1. MAP_POPULATE is missing for mmap in Allocator, because macro OS_LINUX is not defined in allocator.h; 2. MAP_POPULATE has no effect for mremap as for mmap, zero-fill enlarged memory range explicitly to pre-fault the pages After these improvement, queries for ssb 100G have about 14% total performance enhancement. | | | -- | -- | -- | -- | Base: dev-1.0.1-1c5f7da| After fix | Time ratio q1.1 | 347 | 283 | 0.82 q1.2 | 379 | 257 | 0.68 q1.3 | 127 | 132 | 1.04 q2.1 | 3385 | 3148 | 0.93 q2.2 | 1076 | 1056 | 0.98 q2.3 | 863 | 873 | 1.01 q3.1 | 1767 | 1628 | 0.92 q3.2 | 723 | 722 | 1.00 q3.3 | 556 | 541 | 0.97 q3.4 | 108 | 114 | 1.06 q4.1 | 2326 | 2039 | 0.88 q4.2 | 1446 | 1117 | 0.77 q4.3 | 2403 | 1501 | 0.62 Total | 15506 | 13411 | 0.86 | | -2095 | </byte-sheet-html-origin></span></div> </div></div> Issue Number: close #xxx ## Problem Summary: Describe the overview of changes. ## Checklist(Required) 1. Does it affect the original behavior: (Yes/No/I Don't know) 2. Has unit tests been added: (Yes/No/No Need) 4. Has document been added or modified: (Yes/No/No Need) 5. Does it need to update dependencies: (Yes/No) 6. Are there any changes that cannot be rolled back: (Yes/No) ## Further comments If this is a relatively large or complex change, kick off the discussion at [[email protected]](mailto:[email protected]) by explaining why you chose the solution you did and what alternatives you considered, etc... -- 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. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
