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ASF GitHub Bot commented on IGNITE-7182: ---------------------------------------- GitHub user dspavlov opened a pull request: https://github.com/apache/ignite/pull/3830 IGNITE-7182 Supported striped dirty page storage in skip list maps And quick sort with early cp pages write start You can merge this pull request into a Git repository by running: $ git pull https://github.com/gridgain/apache-ignite ignite-7182-buckets2 Alternatively you can review and apply these changes as the patch at: https://github.com/apache/ignite/pull/3830.patch To close this pull request, make a commit to your master/trunk branch with (at least) the following in the commit message: This closes #3830 ---- commit f5fbd1a8951f73897aaadea2656ec35ede852762 Author: dpavlov <dpavlov@...> Date: 2018-04-16T14:36:02Z IGNITE-7182 Supported striped dirty page storage in skip list maps and quick sort with early cp pages write start ---- > Slow sorting of pages collection on checkpoint begin can cause zero dropdown > even with throttling enabled > --------------------------------------------------------------------------------------------------------- > > Key: IGNITE-7182 > URL: https://issues.apache.org/jira/browse/IGNITE-7182 > Project: Ignite > Issue Type: Improvement > Components: persistence > Affects Versions: 2.3 > Reporter: Ivan Rakov > Assignee: Dmitriy Pavlov > Priority: Major > Fix For: 2.6 > > > Tests show that GridCacheDatabaseSharedManager#splitAndSortCpPagesIfNeeded > call can last several seconds on nodes with big amount of memory (>10GB). We > should optimize sorting algorithm, possibly making it multithreaded. > Another option to make pages write throttling more smooth is to get rid of > this heuristic: > {noformat} > // Starting with 0.05 to avoid throttle right after > checkpoint start > // 7/12 is maximum ratio of dirty pages > dirtyRatioThreshold = (dirtyRatioThreshold * 0.95 + 0.05) * 7 > / 12; > {noformat} > We should replace "magic" lower bound 0.05 * 7 / 12 with the real percentage > of dirty pages at the moment of > GridCacheDatabaseSharedManager.Checkpointer#markCheckpointBegin call return. -- This message was sent by Atlassian JIRA (v7.6.3#76005)