Re: Include prelink in fedora arm?

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 On Thu, 8 Sep 2011 11:38:19 +0200, Jan Kratochvil 
 <jan.kratochvil@xxxxxxxxxx> wrote:
> On Thu, 08 Sep 2011 11:28:52 +0200, Gordan Bobic wrote:
>> On Wed, 7 Sep 2011 18:09:34 +0200, Jan Kratochvil >  
>> <jan.kratochvil@xxxxxxxxxx> wrote:
>> > No.  Please read /etc/sysconfig/prelink and
>> > PRELINK_FULL_TIME_INTERVAL, only
>> > once per two weeks.
>>
>>  I meant every time prelink is run, not every time the binary is 
>> run.
>
> There is some misunderstanding here.  prelink is run daily and it 
> only
> prelinks newly installed/upgraded executables, it does not touch 
> already
> prelinked executables.  Once per two weeks it re-prelinks everything.
>
> So if your concerns are about changed executables content (for flash 
> wear
> leveling?) that happens at most once per two weeks.  I believe this 
> is
> negligible change compared to other /var files changing all the time.

 That argument is bogus since on a sanely configured flash system most 
 of write-heavy /var things should be on tmpfs anyway. There is an 
 (ignored) rhbz ticket filed for it.

>>  You are missing the main point - how much extra CPU and disk I/O is
>>  that going to take during the backup?
>
> Less than all the runtime relocations when executing the programs all 
> the
> time.

 Bogus for servers where things tend to load once and stay running for 
 months.

> Please keep at the facts and not trying to find any possible reason 
> why to
> avoid prelink.

 I could also invite you to stick to the facts and very realistic common 
 use-cases without trying to justify using prelink at all costs.

 Gordan
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