Welcome to the latest release of the Delphix Engine database virtualization system.

New Features

No new features are included in PostgreSQL plugin version 1.4.3. This release includes a bug fix(listed in this document towards the end).

Plugin Installation

Plugins to support PostgreSQL virtualization are not automatically included in the Virtualization Engine deployment and are installed by Delphix Professional Services or Technical Support. A Support case can be opened requesting installation by following this link.

Migration and Compatibility

Delphix Support Policies specifically list Major and Minor release coverage. If a minor release is listed as covered, then all patch releases under that minor release are certified.






Supported DBMS Version
OS Version

(Open Source & EDB)

(Open Source & EDB)

(Open-source & EDB)

(Open-source & EDB)

(Open-source & EDB)

(Open-source & EDB)
(Open-source & EDB)
RHEL/CentOS 7.3

RHEL/CentOS 7.4

RHEL/CentOS 7.5

RHEL/CentOS 7.6

RHEL/CentOS 7.7

RHEL/CentOS 7.8(error)(error)(error)(error)(error)

RHEL/CentOS 7.9(error)(error)(error)(error)(error)

RHEL/CentOS 8.3(error)(error)(error)(error)(error)




where x represents the minor version.

  • All the available PostgreSQL Database minor versions will be supported for the above-mentioned major versions.
  • Make sure to  install libncurses.5 or libncurses.6 in the host, for supporting RHEL and SUSE. You can refer KBA 5622 for actionable steps.

Plugin/Delphix Engine Compatibility

Plugins should be installed on compatible Delphix Engines per the table below:

The plugin versions from 1.0.1 till 1.3.2 are currently in extended support. Please reach out to Delphix customer support for any queries.

Plugin Version

Delphix Engine Version











OS and Database Version Compatibility Details: 

Below are some of the major points that need to be considered for this plugin :

  • There must be an installation of PostgreSQL on the Staging/Target environment that is compatible with the installation of PostgreSQL on the source environment. Two installations of PostgreSQL are compatible if and only if:

    1. They share the same vendor (for example, PostgreSQL is incompatible with EnterpriseDB Postgres Plus Advanced Server).

    2. They share the same major version number (for example, 9.5.4 is compatible with 9.5, 9.5.3;  however, it is incompatible with 9.3, 9.3.24, or 9.2).

    3. They are compiled against the same architecture (in other words, 32-bit and 64-bit installations of Postgres are incompatible).

    4. They are compiled with the same WAL segment size. The default WAL segment size of 16 MB is rarely changed in practice, so almost all installations of PostgreSQL are compatible with each other in terms of WAL segment size.

  • wal_keep_segments parameter in postgresql.conf file on Source environment should be large enough to support the WAL sync process once the dSource is building up.
  • Any parameter in postgresql.conf which is related to file location if mentioned on Source Database (for example data_directory, hba_fileident_file, external_pid_file, etc) then during dSource creation these parameters must also be provided using the custom configuration icon on the UI and the corresponding location should also exist on Staging. The same process applies during the creation of VDB.
Currently, PostgreSQL Plugin 1.4.1 is not supported on SUSE 12.x.

Unsupported PostgreSQL Versions and Features

  • PostgreSQL versions below 9.4 i.e (9.2, 9.3) are NOT supported by the plugin.
  • It is not possible to access the staging server with PostgreSQL 9.4 and PostgreSQL 9.5 versions.
  • Broadly there are two features that are not supported by the plugin:
    1. Unlogged Tables: All the tables which are not logged (unlogged) will not be supported by the Plugin.
    2. Point In Time recovery: Currently, the Plugin doesn’t support Point in Time recovery of the PostgreSQL database.

Plugin Upgrade Path

Path A - New Plugin installation for PostgreSQL customers:

  • Upload 1.4.3 Plugin for PostgreSQL 9.4.x, 9.5.x, 9.6.x,10.x, 11.x, 12.x, and 13.x customers

Path B - Existing PostgreSQL customers with different Plugin versions:

Your Version

Recommended Upgrade Path to 1.4.3



Upgrade to 1.1.0 and follow the upgrade path below.


Upgrade to 1.2.0 and follow the upgrade path below.


Upgrade to 1.3.0 and follow the upgrade path below.


Upgrade to 1.4.1 or 1.4.2 or 1.4.3 the latest plugin for PostgreSQL.

For PostgreSQL customers with plugin version 1.0.1 or 1.0.2 interested in the External Backups feature:

Plugin upgrade path: 1.0.1 → 1.1.0 → 1.2.0 → 1.3.0 → 1.4.1/1.4.2/1.4.3

Plugin upgrade path 1.0.2 → 1.1.0 → 1.2.0 → 1.3.0 → 1.4.1/1.4.2/1.4.3 

For PostgreSQL customers with Plugin version 1.1.0

Plugin upgrade path: 1.1.0 → 1.2.0 → 1.3.0 → 1.4.1/1.4.2/1.4.3 

For PostgreSQL customer with Plugin version 1.2.0

Plugin upgrade path: 1.2.0 → 1.3.0 → 1.4.1/1.4.2/1.4.3

Upgrading Existing Objects

In order to upgrade the existing objects with 1.1.0 (i.e 1.0.1 → 1.1.0 or 1.0.2 → 1.1.0), just after the upgrade, it is mandatory to update below two parameters of dSource using the "custom Configuration" option on the UI :

  • Source IP Address
  • Source Port

A critical fault will show up on dSource just after the upgrade. It is because the engine is not able to find the source config from which dSource was created. As we have moved to manual discovery in this release, we need to mark this fault as resolve on the status tab of dSource.

Fixed Issues

PostgreSQL version 1.4.3 contains the following bug fix:




The plugin doesn't check if the staging Postgres database is in a stable state or not