anaconda update time needs to be improved

[Callum Lerwick]

On Fri, 2006-10-27 at 11:13 -0700, John Reiser wrote:
> It feels like there is a quadratic algorithm somewhere,

As usual, I ride the edge and am yum updating all my machines. First I
tried my laptop which is a 700mhz PIII. I installed the new
fedora-release package, did a "yum update glibc\*" then "yum update yum
\* rpm\*", so that its running the FC6 yum/rpm, before going for a full
"yum update". It pegs the CPU for a long long time after "Reading
repository metadata in from local files". Its not noticeably accessing
the disk, or using a large amount of RAM. The system time is at 30%, yum
takes the rest. The fan in my laptop is horribly worn out, something
pegging the CPU for more than a minute or so causes it to overheat and
turn off. I have been unable to complete a "yum update". I one sat and
kept smacking the fan so it would keep spinning, yum went for a good 20
minutes before I got bored and distracted and let it overheat. (Sudden
power failures during an RPM transaction is GREAT for your package
database...) Updating a subset of packages at a time is much faster,
"yum update xorg\*", "yum update lib\*", but it still takes 10sec-1min
in the CPU crunching state depending on how many packages are involved.

I'm trying it right now on my Athlon 64 3000+ desktop. I installed the
release file, did a "yum update glibc\*", then went for a "yum update",
so this time its with the FC5 yum. It didn't spend more than a few
seconds after reading the metadata before it went to "Resolving
Dependencies", spewing out lines of "Package xxxxxx set to be updated".
(and eventually failing due to some weird dependency problem)

So now I just did a "yum update rpm\* yum\*", "yum clean all", then
tried "yum update". Its doing the same thing, pegging the CPU, 20%
system time, yum eating the rest. It took almost exactly 5 minutes to
get from "Reading repository metadata in from local files" to "Resolving
Dependencies".

I'd say yes, there's something going horribly wrong in the FC6 yum.
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