• 每秒最多350,000不良读取查询(快了4加倍多)
  • 针对数据仓库查询的只有对索引的围观(快了2-20倍)
  • 每秒最多14,000次等数据写入




The PostgreSQL Global Development Group announces PostgreSQL 9.2, the
latest release of the leader in open source databases. Since the beta
release was announced in May, developers and vendors have praised it as
a leap forward in performance, scalability and flexibility. Users are
expected to switch to this version in record numbers.

“PostgreSQL 9.2 will ship with native JSON support, covering indexes,
replication and performance improvements, and many more features. We
are eagerly awaiting this release and will make it available in Early
Access as soon as it’s released by the PostgreSQL community,” said
Ines Sombra, Lead Data Engineer, Engine Yard.


Improved Performance and Scalability

With the addition of linear scalability to 64 cores, index-only scans
and reductions in CPU power consumption, PostgreSQL 9.2 has
significantly improved scalability and developer flexibility for the
most demanding workloads. Organizations like the U.S. Federal Aviation
Administration and run applications on PostgreSQL, and HP has
adopted it for their remote support software and to power their
HP-UX/Itanium solutions.

Improvements in vertical scalability increase PostgreSQL’s ability to
efficiently utilize hardware resources on larger servers. Advances in
lock management, write efficiency, index-only access and other low-level
operations allow the database engine to handle even larger-volume

Numerically, this means:

  • Up to 350,000 read queries per second (more than 4X faster)
  • Index-only scans for data warehousing queries (2–20X faster)
  • Up to 14,000 data writes per second (5X faster)

Also, the addition of cascading replication enables users to run even
larger stacks of horizontally scaled servers under PostgreSQL 9.2.

“NewsBlur, a social news reader, relies on Postgres for storing
millions of sites and subscriptions. Solid and reliable for years,”
said Samuel Clay, founder of “We’re consistently on the
bleeding edge (9.1 now, moving to 9.2 soon for the cascading
replication alone) and it’s been a pleasure since 8.4.”

Flexible Developer Support

The flexibility of PostgreSQL is reflected in the diversity of
organisations that have adopted it. For example NASA, the Chicago
Mercantile Exchange and Instagram all rely on it to perform
mission-critical applications. Version 9.2 extends this flexibility even
further by including support for Range Types and JSON, allowing
developers to use PostgreSQL in completely new ways.

Range Types allow developers to create better calendaring, scientific,
and financial applications. No other major SQL database supports this
feature, which enables intelligent handling of blocks of time and

With PostgreSQL 9.2, query results can be returned as JSON data types.
Combined with the new PL/V8 Javascript and PL/Coffee database
programming extensions, and the optional HStore key-value store, users
can now utilize PostgreSQL like a “NoSQL” document database, while
retaining PostgreSQL’s reliability, flexibility and performance.

“Native JSON support in PostgresSQL provides an efficient mechanism
for creating and storing documents for web APIs. We use front-end
libraries like jQuery to request tabular and tree-structured data; and
the new features make it convenient and provide performance advantages
in retrieving that data as JSON, ” said Taras Mitran, Senior
Architect, IVC Inc.