After reducing the value of innodb_buffer_pool_size at runtime from 90G to 50G with "set global", the memory is not released to system, OOM event strikes.
Happened to multiple servers with same configuration.
other relevant variables:
innodb_buffer_pool_chunk_size=134217728
innodb_buffer_pool_instances=1
- relates to
-
MDEV-29445
reorganise innodb buffer pool (and remove buffer pool chunks)
-
-
Closed
{"report":{"fcp":982.6999998092651,"ttfb":164.60000038146973,"pageVisibility":"visible","entityId":125510,"key":"jira.project.issue.view-issue","isInitial":true,"threshold":1000,"elementTimings":{},"userDeviceMemory":8,"userDeviceProcessors":64,"apdex":0.5,"journeyId":"9c3767a4-1928-4c3d-b334-0e958a7b4ac5","navigationType":0,"readyForUser":1097.9000005722046,"redirectCount":0,"resourceLoadedEnd":688.1000003814697,"resourceLoadedStart":174.80000019073486,"resourceTiming":[{"duration":85.30000019073486,"initiatorType":"link","name":"https://jira.mariadb.org/s/2c21342762a6a02add1c328bed317ffd-CDN/lu2bu7/820016/12ta74/0a8bac35585be7fc6c9cc5a0464cd4cf/_/download/contextbatch/css/_super/batch.css","startTime":174.80000019073486,"connectEnd":0,"connectStart":0,"domainLookupEnd":0,"domainLookupStart":0,"fetchStart":174.80000019073486,"redirectEnd":0,"redirectStart":0,"requestStart":0,"responseEnd":260.1000003814697,"responseStart":0,"secureConnectionStart":0},{"duration":85.20000076293945,"initiatorType":"link","name":"https://jira.mariadb.org/s/7ebd35e77e471bc30ff0eba799ebc151-CDN/lu2bu7/820016/12ta74/8679b4946efa1a0bb029a3a22206fb5d/_/download/contextbatch/css/jira.browse.project,project.issue.navigator,jira.view.issue,jira.general,jira.global,atl.general,-_super/batch.css?agile_global_admin_condition=true&jag=true&jira.create.linked.issue=true&slack-enabled=true","startTime":175.19999980926514,"connectEnd":0,"connectStart":0,"domainLookupEnd":0,"domainLookupStart":0,"fetchStart":175.19999980926514,"redirectEnd":0,"redirectStart":0,"requestStart":0,"responseEnd":260.4000005722046,"responseStart":0,"secureConnectionStart":0},{"duration":351.1000003814697,"initiatorType":"script","name":"https://jira.mariadb.org/s/fbf975c0cce4b1abf04784eeae9ba1f4-CDN/lu2bu7/820016/12ta74/0a8bac35585be7fc6c9cc5a0464cd4cf/_/download/contextbatch/js/_super/batch.js?locale=en","startTime":175.30000019073486,"connectEnd":279.19999980926514,"connectStart":279.19999980926514,"domainLookupEnd":279.19999980926514,"domainLookupStart":279.19999980926514,"fetchStart":175.30000019073486,"redirectEnd":0,"redirectStart":0,"requestStart":279.5,"responseEnd":526.4000005722046,"responseStart":293.30000019073486,"secureConnectionStart":279.19999980926514},{"duration":512.6999998092651,"initiatorType":"script","name":"https://jira.mariadb.org/s/099b33461394b8015fc36c0a4b96e19f-CDN/lu2bu7/820016/12ta74/8679b4946efa1a0bb029a3a22206fb5d/_/download/contextbatch/js/jira.browse.project,project.issue.navigator,jira.view.issue,jira.general,jira.global,atl.general,-_super/batch.js?agile_global_admin_condition=true&jag=true&jira.create.linked.issue=true&locale=en&slack-enabled=true","startTime":175.4000005722046,"connectEnd":175.4000005722046,"connectStart":175.4000005722046,"domainLookupEnd":175.4000005722046,"domainLookupStart":175.4000005722046,"fetchStart":175.4000005722046,"redirectEnd":0,"redirectStart":0,"requestStart":280.6000003814697,"responseEnd":688.1000003814697,"responseStart":303.19999980926514,"secureConnectionStart":175.4000005722046},{"duration":144.9000005722046,"initiatorType":"script","name":"https://jira.mariadb.org/s/94c15bff32baef80f4096a08aceae8bc-CDN/lu2bu7/820016/12ta74/c92c0caa9a024ae85b0ebdbed7fb4bd7/_/download/contextbatch/js/atl.global,-_super/batch.js?locale=en","startTime":175.5,"connectEnd":175.5,"connectStart":175.5,"domainLookupEnd":175.5,"domainLookupStart":175.5,"fetchStart":175.5,"redirectEnd":0,"redirectStart":0,"requestStart":281.9000005722046,"responseEnd":320.4000005722046,"responseStart":318.9000005722046,"secureConnectionStart":175.5},{"duration":141.39999961853027,"initiatorType":"script","name":"https://jira.mariadb.org/s/d41d8cd98f00b204e9800998ecf8427e-CDN/lu2bu7/820016/12ta74/1.0/_/download/batch/jira.webresources:calendar-en/jira.webresources:calendar-en.js","startTime":175.60000038146973,"connectEnd":175.60000038146973,"connectStart":175.60000038146973,"domainLookupEnd":175.60000038146973,"domainLookupStart":175.60000038146973,"fetchStart":175.60000038146973,"redirectEnd":0,"redirectStart":0,"requestStart":282.5,"responseEnd":317,"responseStart":315,"secureConnectionStart":175.60000038146973},{"duration":143,"initiatorType":"script","name":"https://jira.mariadb.org/s/d41d8cd98f00b204e9800998ecf8427e-CDN/lu2bu7/820016/12ta74/1.0/_/download/batch/jira.webresources:calendar-localisation-moment/jira.webresources:calendar-localisation-moment.js","startTime":175.69999980926514,"connectEnd":175.69999980926514,"connectStart":175.69999980926514,"domainLookupEnd":175.69999980926514,"domainLookupStart":175.69999980926514,"fetchStart":175.69999980926514,"redirectEnd":0,"redirectStart":0,"requestStart":283.69999980926514,"responseEnd":318.69999980926514,"responseStart":317.1000003814697,"secureConnectionStart":175.69999980926514},{"duration":106.10000038146973,"initiatorType":"link","name":"https://jira.mariadb.org/s/b04b06a02d1959df322d9cded3aeecc1-CDN/lu2bu7/820016/12ta74/a2ff6aa845ffc9a1d22fe23d9ee791fc/_/download/contextbatch/css/jira.global.look-and-feel,-_super/batch.css","startTime":175.80000019073486,"connectEnd":0,"connectStart":0,"domainLookupEnd":0,"domainLookupStart":0,"fetchStart":175.80000019073486,"redirectEnd":0,"redirectStart":0,"requestStart":0,"responseEnd":281.9000005722046,"responseStart":0,"secureConnectionStart":0},{"duration":106.89999961853027,"initiatorType":"link","name":"https://jira.mariadb.org/s/3ac36323ba5e4eb0af2aa7ac7211b4bb-CDN/lu2bu7/820016/12ta74/d176f0986478cc64f24226b3d20c140d/_/download/contextbatch/css/com.atlassian.jira.projects.sidebar.init,-_super,-project.issue.navigator,-jira.view.issue/batch.css?jira.create.linked.issue=true","startTime":175.9000005722046,"connectEnd":0,"connectStart":0,"domainLookupEnd":0,"domainLookupStart":0,"fetchStart":175.9000005722046,"redirectEnd":0,"redirectStart":0,"requestStart":0,"responseEnd":282.80000019073486,"responseStart":0,"secureConnectionStart":0},{"duration":142.5999994277954,"initiatorType":"script","name":"https://jira.mariadb.org/rest/api/1.0/shortcuts/820016/47140b6e0a9bc2e4913da06536125810/shortcuts.js?context=issuenavigation&context=issueaction","startTime":175.9000005722046,"connectEnd":175.9000005722046,"connectStart":175.9000005722046,"domainLookupEnd":175.9000005722046,"domainLookupStart":175.9000005722046,"fetchStart":175.9000005722046,"redirectEnd":0,"redirectStart":0,"requestStart":284.1000003814697,"responseEnd":318.5,"responseStart":315.9000005722046,"secureConnectionStart":175.9000005722046},{"duration":147.9000005722046,"initiatorType":"script","name":"https://jira.mariadb.org/s/3339d87fa2538a859872f2df449bf8d0-CDN/lu2bu7/820016/12ta74/d176f0986478cc64f24226b3d20c140d/_/download/contextbatch/js/com.atlassian.jira.projects.sidebar.init,-_super,-project.issue.navigator,-jira.view.issue/batch.js?jira.create.linked.issue=true&locale=en","startTime":176,"connectEnd":176,"connectStart":176,"domainLookupEnd":176,"domainLookupStart":176,"fetchStart":176,"redirectEnd":0,"redirectStart":0,"requestStart":284.80000019073486,"responseEnd":323.9000005722046,"responseStart":319.5,"secureConnectionStart":176},{"duration":501.9000005722046,"initiatorType":"script","name":"https://jira.mariadb.org/s/d41d8cd98f00b204e9800998ecf8427e-CDN/lu2bu7/820016/12ta74/1.0/_/download/batch/jira.webresources:bigpipe-js/jira.webresources:bigpipe-js.js","startTime":183.19999980926514,"connectEnd":183.19999980926514,"connectStart":183.19999980926514,"domainLookupEnd":183.19999980926514,"domainLookupStart":183.19999980926514,"fetchStart":183.19999980926514,"redirectEnd":0,"redirectStart":0,"requestStart":364.5,"responseEnd":685.1000003814697,"responseStart":676.4000005722046,"secureConnectionStart":183.19999980926514},{"duration":502.19999980926514,"initiatorType":"script","name":"https://jira.mariadb.org/s/d41d8cd98f00b204e9800998ecf8427e-CDN/lu2bu7/820016/12ta74/1.0/_/download/batch/jira.webresources:bigpipe-init/jira.webresources:bigpipe-init.js","startTime":183.30000019073486,"connectEnd":183.30000019073486,"connectStart":183.30000019073486,"domainLookupEnd":183.30000019073486,"domainLookupStart":183.30000019073486,"fetchStart":183.30000019073486,"redirectEnd":0,"redirectStart":0,"requestStart":441.6000003814697,"responseEnd":685.5,"responseStart":679.3000001907349,"secureConnectionStart":183.30000019073486},{"duration":138.5,"initiatorType":"xmlhttprequest","name":"https://jira.mariadb.org/rest/webResources/1.0/resources","startTime":689.3000001907349,"connectEnd":689.3000001907349,"connectStart":689.3000001907349,"domainLookupEnd":689.3000001907349,"domainLookupStart":689.3000001907349,"fetchStart":689.3000001907349,"redirectEnd":0,"redirectStart":0,"requestStart":796.1999998092651,"responseEnd":827.8000001907349,"responseStart":827.3000001907349,"secureConnectionStart":689.3000001907349},{"duration":152.0999994277954,"initiatorType":"xmlhttprequest","name":"https://jira.mariadb.org/rest/webResources/1.0/resources","startTime":915.9000005722046,"connectEnd":915.9000005722046,"connectStart":915.9000005722046,"domainLookupEnd":915.9000005722046,"domainLookupStart":915.9000005722046,"fetchStart":915.9000005722046,"redirectEnd":0,"redirectStart":0,"requestStart":1035.9000005722046,"responseEnd":1068,"responseStart":1067.4000005722046,"secureConnectionStart":915.9000005722046},{"duration":135.10000038146973,"initiatorType":"script","name":"https://www.google-analytics.com/analytics.js","startTime":974.1999998092651,"connectEnd":0,"connectStart":0,"domainLookupEnd":0,"domainLookupStart":0,"fetchStart":974.1999998092651,"redirectEnd":0,"redirectStart":0,"requestStart":0,"responseEnd":1109.3000001907349,"responseStart":0,"secureConnectionStart":0}],"fetchStart":0,"domainLookupStart":0,"domainLookupEnd":0,"connectStart":0,"connectEnd":0,"requestStart":43,"responseStart":164,"responseEnd":182,"domLoading":169,"domInteractive":1160,"domContentLoadedEventStart":1160,"domContentLoadedEventEnd":1209,"domComplete":1400,"loadEventStart":1400,"loadEventEnd":1401,"userAgent":"Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)","marks":[{"name":"bigPipe.sidebar-id.start","time":1133.4000005722046},{"name":"bigPipe.sidebar-id.end","time":1134.3000001907349},{"name":"bigPipe.activity-panel-pipe-id.start","time":1134.4000005722046},{"name":"bigPipe.activity-panel-pipe-id.end","time":1135.6999998092651},{"name":"activityTabFullyLoaded","time":1229.1999998092651}],"measures":[],"correlationId":"dcff33ee201e81","effectiveType":"4g","downlink":10,"rtt":0,"serverDuration":68,"dbReadsTimeInMs":11,"dbConnsTimeInMs":17,"applicationHash":"9d11dbea5f4be3d4cc21f03a88dd11d8c8687422","experiments":[]}}
MariaDB Server 10.5 only supports InnoDB buf_pool instance. If I remember it correctly, the initially allocated buffer pool chunk can never be released. The data structures would be greatly simplified in
MDEV-29445, where I intend to allocate one contiguous range of virtual memory addresses for the entire buffer pool.