What's New in Postgres Plus Advanced Server 9.3

© 2013 EDB All rights reserved 8.1. 1

What’s new in Postgres Plus Advanced Server 9.3?

Craig Silveira

Director, Product management


Synchronized with and contributing to the PostgreSQL community

Postgres Plus: A Super-Set of Features


Core PostgreSQL New Features/Improvements


PostgreSQL 9.3 Performance!•  pg_upgrade parallel process enhancements

pg_upgrade performance�seconds vs number of tables�


PostgreSQL 9.3 Performance!•  Optimize Referential Integrity Checks Involving NULLs

−  #1 deadlock issue in Postgres −  UPDATEs that do not affect columns in foreign key now take new

lock: NO KEY UPDATE lock so it doesn’t block −  Foreign key checks use KEY SHARE lock which doesn’t block −  Should greatly benefit systems with high concurrency

•  New lock parameter −  Lock_timeout specifies how long to wait to acquire a lock


PostgreSQL 9.3 Materialized Views!

•  A stored query result

•  Can be refreshed ad-hoc

•  For results that don't need to be completely up-to-date

•  Useful for reporting and warehousing data

•  Can be indexed like a regular table

•  Won’t thrash shared cache

•  Can reduce memory usage of server

•  #1 requested feature by Postgres Community


Materialized View Example!

!!SELECT survey_date, count(survey_result_count) total_surveys,! round(avg(survey_result_count)) average_result,! min(survey_result_count) smallest_sample,! max(survey_result_count) largest_sample!FROM survey_results!GROUP BY survey_date!ORDER BY survey_date ASC;!!

CREATE MATERIALIZED VIEW survey_summary AS!SELECT survey_date, count(survey_result_count) total_surveys,! round(avg(survey_result_count)) average_result,! min(survey_result_count) smallest_sample,! max(survey_result_count) largest_sample!FROM survey_results!GROUP BY survey_date!ORDER BY survey_date ASC;!!SELECT * FROM survey_summary;!!!

CREATE TABLE survey_results (id serial PRIMARY KEY, survey_date date, survey_id int, survey_result_count int);!

Takes 7.5 seconds to execute on test machine on table with 20 million rows: 7552.442 ms

Creating the view takes the same time to execute as the original query.

Executing survey_summary query takes 4.62ms


PostgreSQL 9.3 Additional Features!•  User Defined Background Worker Processes

−  Develop own processes using PostgreSQL as workload coordinator

•  Writeable Foreign Tables

•  Extend large object access to 4TB −  The previous limit was 2GB

•  Auto updateable views – instead of triggers no longer needed

•  Event Triggers −  Triggers fire on DDL actions

•  Continued development of NoSQL-like functionality −  Additional constructor and extractor methods −  JSON parsing support −  Hstore/JSON casting functions

•  LATERAL Joins


PostgreSQL 9.3 Additional Features con’t!•  Enhanced Reliability and Availability

−  Fast failover −  Ensures sub second failover thus providing ‘carrier grade’ availability

−  Streaming re-mastering −  Makes reconfiguration of replicas after failover easier

−  Data page checksums −  Helps identify bad disks that could lead to data corruption

−  PG_ISREADY utility −  A new CLI utility to test whether a server is ready to accept connections −  Ex pg_isready –h localhost –p 5432

−  Pg_basebackup generates basic recovery file −  Simplifies setup of standby database

−  Architecture independent streaming


PPAS New Features


Advanced Server 9.3 Oracle Compatibility!•  Package Support for:

−  DBMS_RANDOM - random number generator −  DBMS_SCHEDULER – db job scheduler −  DBMS_CRYPTO – data encryption −  DBMS_LOCK.sleep −  DBMS_MVIEW – materialized view management

•  Package Support for: −  UTL_HTTP – make url calls and return page contents

−  UTL_URL

•  Support for Functions: −  REGEXP_INSTR −  REGEXP_COUNT −  REGEXP_SUBSTR

•  Custom constructor methods for Objects

•  Oracle compatible Materialized Views


Advanced Server 9.3!

•  EDB Loader Enhancements −  Perform updates as well as inserts −  New bulk loading options – ROWS parameter −  Environment variables for control

•  RPM distributions for Linux −  Easier and more consistent installations and maintenance

•  Partitioning improvements −  Fast pruning −  Ability to address more partitions without performance degradation


Fast Pruning Enhancement!


Scale to Larger # of Partitions!


EDB Failover Manager


What is Failover Manager?

•  A solution to aid in the creation of highly available configurations of Postgres

•  Monitors the health of a Postgres HA configuration

•  Automates the failover process in the even of a failure

•  Used in conjunction with Streaming Replication


Failover Manager Architecture

Agent Agent


Failover Manager Features

•  Automatic Failover from master to replica node

•  Configurable fencing operation −  By default uses VIP −  Parameter to specify alternative operation

−  Ex: reconfigure a load balancer

•  Manual failover configuration possible

•  Email notifications when cluster status changes •  Witness node provides protection against ‘split brain’ scenarios

•  User configurable wait times

•  Built on PPCD/Jgroups technology −  Proven functionality


Postgres Enterprise Manager 4.0


• Single management console allows easy visual control

• Works for both PostgreSQL and Postgres Plus

• Graphically start/stop, configure, define and manage storage, security, database objects

MONITOR MANAGE TUNE

Only solution available combining all three tasks into one tool

Postgres Enterprise Manager (PEM)


Postgres Enterprise Manager 4.0 •  New Features

− Tuning Wizard − Logfile Alerting − Advanced Graphics − Auto-discovery of

manageable servers by Agent installer

− User Customizable Dashboards

− Bulk Probe Tuning − Many other usability and

performance enhancements

− SQL/Protect support PEM 4.0 Webinar December 17th 1pm EST Register Now!


Summary •  9.3 New Features include significant enhancements in:

−  Performance −  High Availability −  Compatibility −  Ease of Development

•  Be sure to download Postgres Plus Advanced Server 9.3 and give it a try!

http://www.enterprisedb.com/downloads


Technology

What's New in Postgres Plus Advanced Server 9.3