Bug 595557

Summary: prelink launch
Product: [Fedora] Fedora Reporter: Fabrício Godoy <skarllot>
Component: prelinkAssignee: Jakub Jelinek <jakub>
Status: CLOSED WORKSFORME QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: low    
Version: 12CC: eirik.thorsnes, jakub, ndbecker2
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: 118522 Environment:
Last Closed: 2010-05-25 07:46:26 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Fabrício Godoy 2010-05-25 00:36:09 UTC 
Every time that prelink launches my computer run slow.
I think that this can be solved by three ways: code optimization, less priority or show an alert to user.
Comment 1 Pedro Fernandes Macedo 2010-05-25 07:20:46 UTC 
Please dont randomly add people to CC. I was only adding details to the original bug you cloned as I was seeing it as well. 

--
Pmacedo
Comment 2 Jakub Jelinek 2010-05-25 07:46:26 UTC 
1) massive code optimizations have been done already in the past, and, more importantly, the /etc/cron.daily/prelink script changed, so that most of the days it either doesn't invoke prelink at all (if rpm database hasn't changed since last run, prelink is invoked by default only every week, not every day) or invokes prelink in quick mode (which just checks timestamps rather than actually reading all libraries/binaries to see if they have actually changed.  Unless glibc or some other library with thousands of binaries that link against it is upgraded, even quick mode shouldn't last longer than a minute or two.
So, if prelink is too slow on your box, either you have very small amount of memory, or very slow disk, or encrypted root partition, in each case the problem is in disk IO.

2) prelink runs under 
renice +19 -p $$
so it is very low priority job

3) I doubt anyone but very few people would appreciate something like that.  That is only going to annoy users.
Comment 3 Fabrício Godoy 2010-05-25 12:22:20 UTC 
1) I have 2 GB RAM, 1 TB SATA II HD and none of partitions are encrypted.
I don't know if make difference but I have a lot of "devel" packages.
My PC do not goes too slow but HD works so much.
We should not think about weak computers?

2) Ok.

3) I agree.