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![Range Types
● Temporal range:
[ 2012-04-10, 2012-04-12 )
● Alpha Index:
( Abbe, Babel ]
● Linear distance:
( 375.453, 374.441 )](https://image.slidesharecdn.com/92grandprix2013-130207175646-phpapp02/75/92-grand-prix_2013-26-2048.jpg)
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92 grand prix_2013
This document summarizes Josh Berkus's presentation on new features in PostgreSQL versions 9.1, 9.2, and the upcoming 9.3. Some key highlights include improvements to read and write performance, the addition of JSON data type and PL/v8 and PL/Coffee procedural languages, index-only scans, cascading replication, SP-GiST indexing, and many new monitoring and administration features. Josh Berkus is available for questions at josh@pgexperts.com and encourages attendees to upcoming PostgreSQL conferences.
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92 grand prix_2013
- 1. Josh Berkus LCA 2013
- 3. Write Cascading Read Performance Replication Scalability Index-only Scans Start Other Features JSON DDL Migrations Range Types SP-GiST Admin Tools New Feature Grand Prix
- 4.
- 5. Read Scalability ● fast path sorting ● reduced overhead frequent table locks ● prproc shared memory optimization ● laxy vxid locks ● heap hot search buffer
- 6. Read Scalability 350,000 q.p.s.
- 7. Write Performance ● better group commit ● reduce WalInsertLock contention ● batch tuple copy ● reduced checkpoint activity
- 8. Write Scalability +50% more writes/second
- 9. Parallel Bulk Load 10-15 parallel streams up to 3X load speed
- 10. Index-Only Scans Col 3ms A Cos table books Title C D Dea Dem 300ms Will There Be Faith? State of Wonder Sphere 18c Flr A H Hea Dead Eyes H I Het The Greatest Music N Stories Never Told Rea S N Skeleton Canyon Res U R The Long Snapper Ska Super Immunity S Sut The Barbary Pirates T Heat Tab Confessions of a The U Prairie Bitch W Uvh Talking Pictures Woz Reggie Jackson
- 11. “count(*) is slowin postgres”
- 12. Index-Only Scans Col 3ms A Cos 30ms C Dea D Dem A H Hea H I Het N Rea S N Res U R Ska S Sut T Tab The U W Uvh Visibility Woz Map
- 13. Cascading Replication walreciever walsender walreciever walreciever
- 14. Cascading Replication Sydney North Carolina walsender walsender walreciever walreciever walreciever
- 15. Replication Improvements ● pg_receivexlog an xlog stream reader ● standby-only backup no more snapshotting the master ● recv vs. write modes for synchronous replication
- 16. JSON ● JSON data type ● array-to-json, row-to-json functions ● get query results as JSON!
- 17.
- 18. PL/v8 ● Based on Google's v8 JS engine ● write fast stored procedures in JavaScript ● create ad-hoc attribute indexes on JSON data A data type and PL made for each other!
- 19. create or replacefunction fib(n int) returns int as $$ function fib(n) { return n<2 ? n : fib(n-1) + fib(n-2) } return fib(n) $$ LANGUAGE plv8 IMMUTABLE STRICT;
- 20.
- 21. PL/coffee =# CREATE ORREPLACE FUNCTION public.fibonacci(n integer) RETURNS integer LANGUAGE plcoffee IMMUTABLE STRICT AS $function$ fibonacci = (x)-> return 0 if x == 0 return 1 if x == 1 return fibonacci(x-1) + fibonacci(x-2) return fibonacci n $function$; CREATE FUNCTION
- 22. Indexing 7.1: Generalized SearchTree (GiST) 8.1: Generalized Inverted Index (GIN) 9.1: K-Nearest Neighbor (KNN)
- 23.
- 24. SP-GiST ● Based on “Space-Partitioning Trees” ● Faster to read, faster to update than GiST ● Will cause PostGIS 2.1!
- 25. SP-GiST knn=# create indexpt_gist_idx on geo using gist(point); CREATE INDEX Time: 36672.283 ms Size: 153,124,864 knn=# create index pt_spgist_idx on geo using spgist(point); CREATE INDEX Time: 12805.530 ms ~ 3 times faster ! Size: 153,788,416 ~ the same size
- 26. Range Types ● Temporal range: [ 2012-04-10, 2012-04-12 ) ● Alpha Index: ( Abbe, Babel ] ● Linear distance: ( 375.453, 374.441 )
- 27.
- 28. runtime DDL madeeasy ● DROP INDEX CONCURRENTLY ● NOT VALID CHECK constraints ● less rewriting for ALTER TABLE ● ALTER IF EXISTS ● RENAME domains, FDWs ● vacuum skips locked pages
- 29.
- 30. better monitoring ● new pg_stat_statements ● more autovacuum logging ● track_io_timing ● deadlock, temp file counters ● checkpoint timing in pg_stat_bgwriter
- 31. better EXPLAIN ● track buffers dirtied/written ● report filtered-out rows ● no-TIMING option
- 32. Other Features ● lower CPU wakeups (power saving) ● more sepgsql security ● optimizer improvements ● pg_hba.conf fixes ● XML improvements ● exportable snapshots
- 33. Other Features ● more pg_dump/pg_restore options ● more psql features ● more pg_upgrade fixes, improvements ● dropped support for antiques ● dgux, nextstep, sunos4, svr4, ultrix4, univel, bsdi
- 34.
- 35.
- 36. 9.3 Features (sofar) ● More JSON goodness! ● accessor methods ● constructor methods ● Writable Foreign Data Wrappers ● Event Triggers ● write a trigger on anything ● Updatable VIEWs
- 37. 9.3 Features (sofar) ● create your own background workers ● LATERAL JOINs ● Streaming-only Remastering ● Improved FK locking ● pg_stat_plans
- 38.
- 39. More Information ● Josh Berkus: josh@pgexperts.com ● www.databasesoup.com ● Upcoming Events ● Melbourne pgDay, Monday Feb 5 – 2013.pgday.org.au ● PyPgDay at PyCon 2013 ● pgCon, Ottawa, May 21-25 Text and graphics of this talk are licensed Creative Commons Share-Alike, except where otherwise noted. Most racing photos in the presentation are stock photos which may only be reproduced and reused as a part of this presenstation. Graphs courtesy Robert Haas and Heikki Linnakangas. SP-Gist examples from Oleg Bartunov, PL/v8 and PL/Coffee examples courtesy of Will Leinweber.