The Postgres-XL community has released a new version of the software, tagged as 9.5r1.1. This is a minor update to earlier 9.5r1 release, but contains some very important bug fixes. I would encourage everyone to immediately upgrade to this latest release. Being a minor release, you only need to download the latest sources from , compile, install new binaries and restart your servers. Major...

After months of efforts, I’m pleased that Postgres-XL 9.5r1 is seeing the daylight. It has been tremendous collective efforts by many, both inside and outside 2ndQuadrant . Often it’s not visible via commit history or mailing list communications, but I must admit that many folks have contributed in making this grand release. Contributors who wrote code and sent ideas, those who reviewed the code...

The Postgres-XL 9.5R1Beta2 release went out yesterday. It’s another step forward to have a stable 9.5 release sometime very soon. A few key enhancements from the last beta release are captured in this blog. For the full list, I would recommend to read the release notes. Support for binary data transfer for JDBC and libpq If you’d trouble receiving data in binary format via JDBC or libpq, this...

Sharding or horizontal scalability is a popular topic, discussed widely on PostgreSQL mailing lists these days. When we started the Postgres-XC project back in 2010, not everyone was convinced that we need a multi-node PostgreSQL cluster that scales with increasing demand. Even more likely, we, the PostgreSQL community, were skeptical about whether we have enough resources to design and implement...

I’m extremely pleased to see that after months of efforts and contributions by different people around the world, Postgres-XL 9.5 R1 Beta1 has finally arrived. This release is significantly better, in all respects such as performance, stability and high availability, as compared to the past release. Enormous amount of work has gone into PostgreSQL in the last few years and majority of that is now...

With just couple of weeks to go for PGDay India, I’m quite excited about the upcoming PostgreSQL conference at Bangalore on 26th February, 2016. This is going to be the biggest ever conglomeration of users, developers and companies interested in PostgreSQL in India. This is also by far the largest PostgreSQL conference in terms of number of speakers and attendees. Till last year, we’d to almost...

One of the problems with Postgres-XL 9.2 is that it assigns a global transaction identifier (GXID) for every transaction that is started in the cluster. Since its hard for the system to know if a transaction is read-only or not (remember, even SELECT queries can do write activities), Postgres-XL would always assign a GXID and send that to the datanodes. This is quite bad for system performance...

In Postgres-XL, sequences are maintained at the Global Transaction Manager (GTM) to ensure that they are assigned non-conflicting values when they are incremented from multiple nodes. This adds significant overhead for a query doing thousands of INSERTs in a table with a serial column, incrementing sequence one at a time and making a network roundtrip to the GTM, for every INSERT. Shaun Thomas in...

As you may have noted from my previous blog, the last few months were busy in getting Postgres-XL up-to-date with the latest 9.5 release of PostgreSQL. Once we had a reasonably stable version of Postgres-XL 9.5, we shifted our attention to measure performance of this brand new version of Postgres-XL. Our choice of the benchmark is largely influenced by the ongoing work on the AXLE project, funded...

It’s been busy few months as we work towards merging Postgres-XL with the latest and greatest release of PostgreSQL. Postgres-XL is an open source fork of PostgreSQL that provides a scalable platform for OLTP and Business Intelligence. The current release of Postgres-XL is based on PostgreSQL 9.2, so it lacks all the improvements made to PostgreSQL over the last three years. 2ndQuadrant and other...