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Patryk Pomykalski c41e9d970a Optimize queries and indexes on posts table (#13217 )

* 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

2020-01-10 10:26:44 +05:30

audit_store_test.go

Consistent license message for all the go files (#13235 )

2019-11-29 12:59:40 +01:00

audit_store.go

MM-19877: Remove references to PermanentDeleteBatch from audit store (#13393 )

2019-12-20 15:37:01 +00:00

bot_store_test.go

Consistent license message for all the go files (#13235 )

2019-11-29 12:59:40 +01:00

bot_store.go

[MM-17422] Added code to update, delete last bot_icon time in model.bot. (#12229 )