Search Postgresql Archives

Re: pg_dump slower than pg_restore

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On 03/07/14 18:36, Bosco Rama wrote:
> On 07/03/14 10:04, David Wall wrote:
>> A pg_dump backup -- with most of the data stored as large objects -- 
>> takes about 5 hours.
> If those large objects are 'files' that are already compressed (e.g.
> most image files and pdf's) you are spending a lot of time trying to
> compress the compressed data ... and failing.
>
> Try setting the compression factor to an intermediate value, or even
> zero (i.e. no dump compression).  For example, to get the 'low hanging
> fruit' compressed:
>     $ pg_dump -Z1 -Fc ...
>
> IIRC, the default value of '-Z' is 6.
>
> As usual your choice will be a run-time vs file-size trade-off so try
> several values for '-Z' and see what works best for you.
>
> HTH,
> Bosco.

I'd also check the effect of those other run components; the vacuum's
and other things that are only running with the backup and not during
the restore.

-- 
Tim Clarke




[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Index of Archives]     [Postgresql Jobs]     [Postgresql Admin]     [Postgresql Performance]     [Linux Clusters]     [PHP Home]     [PHP on Windows]     [Kernel Newbies]     [PHP Classes]     [PHP Books]     [PHP Databases]     [Postgresql & PHP]     [Yosemite]
  Powered by Linux