On 7 January 2013 09:19, John R Pierce <pie...@hogranch.com> wrote: > On 1/7/2013 1:10 AM, Simon Riggs wrote: >> >> On 7 January 2013 07:29, Takeshi Yamamuro >> <yamamuro.take...@lab.ntt.co.jp> wrote: >> >>> >Anyway, the compression speed in lz4 is very fast, so in my >>> >opinion, there is a room to improve the current implementation >>> >in pg_lzcompress. >> >> So why don't we use LZ4? > > what will changing compression formats do for compatability? > > this is for the compressed data in pg_toast storage or something? will this > break pg_upgrade style operations?
Anything that changes on-disk format would need to consider how to do pg_upgrade. It's the major blocker in that area. For this, it would be possible to have a new format and old format coexist, but that will take more time to think through than we have for this release, so this is a nice idea for further investigation in 9.4. Thanks for raising that point. -- Simon Riggs http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
