fedup performance

[Panu Matilainen]

On 07/03/2013 07:42 AM, Alex G. wrote:
> On 07/02/2013 08:28 PM, Neal Becker wrote:
>> Not d/l speed related.  I just want to share.  I update a very fast 8 core
>> server, with a conventional disk drive.  Took 2-3 hours, not including d/l.
>>
>> I update my laptop which has an ssd (and MORE packages).  Took 10-15 minutes.
>>
> I think this might simply have to do with rpm running ldconfig (a very
> disk IO expensive operation) for a large number of packages. I'm not
> sure yum/rpm has deferred ldconfig processing.
>
> DISCLAIMER: I may be very wrong. Please don't quote me on this.

ldconfig gets run a lot yes, but its also really fast these days. 
fdatasync() which gets called even more (a lot more at that) seems like 
a more likely painpoint on upgrades.

	- Panu -