c41e9d970a
* Optimize queries and indexes on posts table Added RootId column to two indexes. Query in getParentPosts split into two queries - for big channels can be ~1000x times faster in MySQL, but a bit slower in PostgreSQL. Rewritten query in GetPostsSince for MySQL - around 20% faster. Benchmark results (/1 - 140k posts in channel, /2 - 800 posts): benchmark old ns/op new ns/op delta BenchmarkPosts/postgres/GetFlaggedPostsForTeam/1-16 12068006 12130615 +0.52% BenchmarkPosts/postgres/GetFlaggedPostsForChannel/1-16 7334992 7388359 +0.73% BenchmarkPosts/postgres/GetPosts(skipThreads=true)/1-16 1845547 1979362 +7.25% BenchmarkPosts/postgres/GetPosts(skipThreads=false)/1-16 2260061 2595112 +14.82% BenchmarkPosts/postgres/GetPostsSince(skipThreads=true)/1-16 38510212 40625368 +5.49% BenchmarkPosts/postgres/GetPostsSince(skipThreads=false)/1-16 32389821 32581044 +0.59% BenchmarkPosts/postgres/GetFlaggedPostsForTeam/2-16 1604215 1584941 -1.20% BenchmarkPosts/postgres/GetFlaggedPostsForChannel/2-16 1278623 1277473 -0.09% BenchmarkPosts/postgres/GetPosts(skipThreads=true)/2-16 1921049 1984581 +3.31% BenchmarkPosts/postgres/GetPosts(skipThreads=false)/2-16 3478147 3000086 -13.74% BenchmarkPosts/postgres/GetPostsSince(skipThreads=true)/2-16 4813332 5198276 +8.00% BenchmarkPosts/postgres/GetPostsSince(skipThreads=false)/2-16 3475847 3816201 +9.79% BenchmarkPosts/mysql/GetFlaggedPostsForTeam/1-16 9674132 9708361 +0.35% BenchmarkPosts/mysql/GetFlaggedPostsForChannel/1-16 5780763 5818874 +0.66% BenchmarkPosts/mysql/GetPosts(skipThreads=true)/1-16 2261194 2268826 +0.34% BenchmarkPosts/mysql/GetPosts(skipThreads=false)/1-16 2371804023 3184120 -99.87% BenchmarkPosts/mysql/GetPostsSince(skipThreads=true)/1-16 35552813 27709811 -22.06% BenchmarkPosts/mysql/GetPostsSince(skipThreads=false)/1-16 28758400 22622865 -21.33% BenchmarkPosts/mysql/GetFlaggedPostsForTeam/2-16 1174064 1205933 +2.71% BenchmarkPosts/mysql/GetFlaggedPostsForChannel/2-16 1007026 1091551 +8.39% BenchmarkPosts/mysql/GetPosts(skipThreads=true)/2-16 2274397 2408730 +5.91% BenchmarkPosts/mysql/GetPosts(skipThreads=false)/2-16 7454395 2542741 -65.89% BenchmarkPosts/mysql/GetPostsSince(skipThreads=true)/2-16 8879200 6843435 -22.93% BenchmarkPosts/mysql/GetPostsSince(skipThreads=false)/2-16 6293932 5373276 -14.63% * old version of getParentsPosts for PostgreSQL because new version using two queries is around 15% slower. * review fixes * revert index changes
Mattermost is an open source, private cloud, Slack-alternative from https://mattermost.com.
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