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#14395 PR: Disable sort optimization when tracking all docs
4.5 hours ago  7 comments  0 votes  0 watches  bugmakerrrrrr, github-actions[bot], jpountz, vibrantvarun
Description <!-- If this is your first contribution to Lucene, please make sure you have reviewed the ... https://github.com/apache/lucene/blob/main/CONTRIBUTING.md --> When totalHitsThreshold is greater ...
    github-actions[bot] 4.5 hours ago:  This PR has not had activity in the past 2 weeks, labeling it as stale. If the PR is waiting for review, notify the dev@lucene.apache.org list. Thank you for your contribution!
    vibrantvarun 14.4 days ago:  Overall code looks good to me.

#14549 PR: Enhancing the Turkish stop word list with additional common words
9.5 hours ago  4 comments  0 votes  0 watches  HakanBayazitHabes, bahadirborasahin, github-actions[bot], stefanvodita
Description This pull request proposes the addition of several frequently used Turkish ... These words are commonly considered non-informative in NLP tasks and are consistent with standard ... .
    bahadirborasahin 11 hours ago:  I am not sure if this has any performance implications for Lucene, but the answer is no. In Turkish alphabetical order, the letters ç, ğ, ı, ö, ş, and ü are placed after their ... The standard Turkish alphabet order is: a, b, c, ç, d, e, f, g, ğ, h, ı, i, j, k, l, m, n, o, ö, ...
    stefanvodita 11.7 hours ago:  I'm curious - are ç, ö, ü, ş normally sorted to the end of the alphabet and in this order?

#14552 PR: Speed up flush of softdelete by intoBitset
14 hours ago  1 comments  0 votes  0 watches  gf2121, github-actions[bot]
Speed up the flush of softdelete by intoBitset. relates: https://github.com/apache/lucene/issues/14521
    gf2121 22.9 hours ago:  I managed to get some numbers on this change: ` Baseline: Soft delete flush total took: 30311ms ... Candidate: Soft delete flush total took: 22635ms, IndexedDISIwriteBitset total took: 964ms.

#14556: Smoke tester requiring Python 3.12+
16.2 hours ago  3 comments  0 votes  0 watches  rmuir, stefanvodita
14326 added a line in scriptutil that imports override from typing, which was introduced in Python ... Running the smoke tester with 3.11, errors out like so: ` Traceback (most recent call last): File ...
    rmuir 16.2 hours ago:  I think there is a way, there is even some existing logic to do it (I suspect it has the wrong ... Additionally, I know existing logic uses an outdated method to check the python version: because I ... I've also a concern that for an old python it may just fail at pip install phase, and never hit ...
    stefanvodita 16.4 hours ago:  I see we have 3.12 configured and at least for me that's alright. But do we have a way to warn users of the scripts that they need 3.12?

#14408: Examine the affects of MADV_RANDOM when MGLRU is enabled in Linux kernel
17.5 hours ago  9 comments  0 votes  0 watches  ChrisHegarty, jimczi, jpountz, mikemccand, rmuir, vigyasharma
With the relatively recent capability to call madvise in Lucene, we've started to use MADV_RANDOM ... The memory access is truly random, but we've seen several reports of performance regressions that ... Of particular concern is the interaction of MADV_RANDOM with Multi-Gen LRU [1].
    rmuir 17.5 hours ago:  > +1 to work towards this more general fix. But, sheesh, it looks so complicated, depending on hot vs cold use case, preloading or not, which ... Yes, my argument is that it is complicated, and lucene needs to get out of the business of it.
    mikemccand 17.8 hours ago:  > > The Linux change targets both MGLRU and normal LRU. The impact is more pronounced in MGLRU, as page reclamation is more aggressive there. However, the semantic change for this advice is the same in both cases.

#14482 PR: Create file open hints on IOContext to replace ReadAdvice
20.1 hours ago  63 comments  0 votes  0 watches  ChrisHegarty, github-actions[bot], jpountz, rmuir, thecoop
Refactor IOContext and create FileOpenHint to specify how files are likely to be accessed once ... This is the first PR of several to move from specifying ReadAdvice directly, to specifying the file ... Relates #14422
    thecoop 20.1 hours ago:  I've added an override function to MMapDirectory in eb80be0a7c so the ReadAdvice can be explicitly ...
    thecoop 20.3 hours ago:  I've been looking at trying to push ReadAdvice into MMapDirectory completely - the complication is ... Maybe best to look at that in more detail in a later PR

#14554: How to control the total number of merging threads when vector data merging easily leads to memory ...
1 day ago  0 comments  0 votes  0 watches  weizijun
Description When there are many shards to merge, vector data merging can easily lead to memory ... The index.merge.scheduler.max_thread_count parameter can't control the merge thread count, it only ... But OnHeapHnswGraph has been built during the pause phase, and it will take up so much memory that ...

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