| From: | Andrew Dunstan <andrew(at)dunslane(dot)net> |
|---|---|
| To: | Marc Mamin <M(dot)Mamin(at)intershop(dot)de>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org>, "'michael(dot)paquier(at)gmail(dot)com'" <michael(dot)paquier(at)gmail(dot)com> |
| Subject: | Re: pg_dump -Fd and compression level |
| Date: | 2015-07-25 07:20:13 |
| Message-ID: | 55B338AD.1010703@dunslane.net |
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| Thread: | |
| Lists: | pgsql-hackers |
On 07/25/2015 02:34 AM, Marc Mamin wrote:
>
>> Andrew Dunstan <andrew(at)dunslane(dot)net> writes:
>>> Hmm. Yeah. It looks like commit a7ad5cf0cfcfab8418000d652fa4f0c6ad6c8911
>>> changed from using the default compression for libz to using the
>>> compression set in pg_dump options, which defaults to 0. This actually
>>> seems like the right thing to do, but it certainly should have been
>>> called out much more forcefully in release notes, and arguably should
>>> not have been changed in stable releases. Not sure what we do about it now.
> really 0? wouldn't that mean no compression at all?
No, that's not right either. The default should be
Z_DEFAULT_COMPRESSION, so we shouldn't actually see a difference in the
default case. And it is definitely compressing some. So I'm now puzzled
by what you're seeing.
cheers
andrew
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