| From: | Stephen Frost <sfrost(at)snowman(dot)net> |
|---|---|
| To: | Bruce Momjian <bruce(at)momjian(dot)us> |
| Cc: | Claudio Freire <klaussfreire(at)gmail(dot)com>, Andres Freund <andres(at)2ndquadrant(dot)com>, "ktm(at)rice(dot)edu" <ktm(at)rice(dot)edu>, Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, Jeff Davis <pgsql(at)j-davis(dot)com>, Heikki Linnakangas <hlinnakangas(at)vmware(dot)com>, Fujii Masao <masao(dot)fujii(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Compression of full-page-writes |
| Date: | 2015-01-02 18:05:49 |
| Message-ID: | 20150102180549.GC3062@tamriel.snowman.net |
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| Lists: | pgsql-hackers |
* Bruce Momjian (bruce(at)momjian(dot)us) wrote:
> To be specific, desirable in streaming replication scenarios that don't
> use SSL compression. (What percentage is that?) It is something we
> should mention in the docs for this feature?
Considering how painful the SSL rengeotiation problems were and the CPU
overhead, I'd be surprised if many high-write-volume replication
environments use SSL at all.
There's a lot of win to be had from compression of FPWs, but it's like
most compression in that there are trade-offs to be had and environments
where it won't be a win, but I believe those cases to be the minority.
Thanks,
Stephen
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