PostgreSQL network compression for result set

compressionNetworkpostgresql

I was reading about network compression with PostgreSQL to see if there was anything that offered that which would permit big result sets to transfer over the wire to remote web servers. It seems there is nothing of this sort. Is there a solution out there to do that, that isn't SSL?

SSL

It seems at one point there was a solution involving SSL. Having read the threads pertaining to that, it seems that the solution is no longer advisable as it leaves the system vulnerable to a CRIME worldwide bug.

Though not advisable, it seems that you can re-enable SSL Compression at least currently with OPENSSL_DEFAULT_ZLIB but that it will be removed in the future and that it's currently disabled at compiled time in openssl.

no-zlib         [default]
no-zlib-dynamic [default]

Best Answer

This part of the documentation describes how you can do it by first setting up an SSH tunnel (outside of Postgres) and then connecting to that. If you add the -C flag to the ssh command, it should enable compression.

https://www.postgresql.org/docs/current/static/ssh-tunnels.html

Related Solutions

Oracle SecureFile Compression

Assuming you have the appropriate DBA-level permissions, you can try this to get some basic information on the SecureFile/LOBs in your system:

SELECT table_name, segment_name, index_name, securefile, in_row
FROM user_lobs;

You can get the size on disk for a specific table name (your table with a SecureFile/LOB) by doing this:

SELECT segment_name, segment_type, segment_subtype, bytes/1024/1024 meg_bytes
FROM user_segments
WHERE table_name = 'yourTableName';

To get the actual compression rating (no/low/high), try this using your table name:

SELECT table_name, column_name, partition_name, tablespace_name, compression, deduplication
FROM user_lob_partitions
WHERE table_name = 'yourTableName';

Hope this helps!

Sql-server – SQL Server 2012 Page Compression – Determine compression ratio

How about sp_estimate_data_compression_savings?

It allows you to estimate the gain from compression BEFORE you compress the table, but it's quite accurate.

SSL

Best Answer

Related Solutions

Oracle SecureFile Compression

Sql-server – SQL Server 2012 Page Compression – Determine compression ratio

Related Question