After reboot after update, alot more memory is used

[Ian Corne]

Binary package hint: dpkg

I'm not sure dpkg is the one to blame.

When booting after an update, 747mb/1000mb ram is used. When i boot normally, only 150mb is used.

It's only the first boot after an update.

This cripples the systems with only 1gb pretty hard.

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: dpkg 1.15.7.2ubuntu1
ProcVersionSignature: Ubuntu 2.6.35-6.7-generic 2.6.35-rc3
Uname: Linux 2.6.35-6-generic i686
Architecture: i386
Date: Sat Jun 26 18:33:07 2010
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Alpha i386 (20100601)
ProcEnviron:
 PATH=(custom, no user)
 LANG=en_US.utf8
 SHELL=/bin/bash
SourcePackage: dpkg

[Dave Gilbert (ubuntu-treblig)]

Can you define 'used' - is this in the output of free? top? If it's in this state and you do a top and type a capital M to sort by
memory what's the biggest user?

Dave

[Ian Corne (icorne)]

Used as in not available.

This is from my other box, as the laptop had rebooted already.

After update after first reboot:

$ free -m
             total used free shared buffers cached
Mem: 3149 1209 1940 0 27 417
-/+ buffers/cache: 764 2385
Swap: 1906 0 1906

$ cat /proc/slabinfo | pastebinit
http://pastebin.com/ZwwE0J3r

[Ian Corne (icorne)]

The memory usage in top/htop ps does not add up to the total amount used shown. I've read that kernel memory/processes is/are not shown in top/htop/ps so that might be where the big user is.

[Ian Corne (icorne)]

$ ps -eaf | pastebinit
http://pastebin.com/LGJ9NDRE

[Ian Corne (icorne)]

Now with capital F
$ ps -eaF | pastebinit
http://pastebin.com/yvfR9wU2

[Ian Corne (icorne)]

To show the difference:

After anoter reboot:

$ ps -eaF | pastebinit
http://pastebin.com/iQJ9HNQD

$ cat /proc/slabinfo | pastebinit
http://pastebin.com/HxPGmSe8

$ free -m
             total used free shared buffers cached
Mem: 3149 821 2328 0 154 431
-/+ buffers/cache: 235 2913
Swap: 1906

[Philip Muškovac (yofel)]

Confirmed here on maverick, first reboot: (that's without even X running)
             total used free shared buffers cached
Mem: 3784952 1564912 2220040 0 34808 195148
-/+ buffers/cache: 1334956 2449996

second reboot:
             total used free shared buffers cached
Mem: 3784952 574988 3209964 0 59636 195804
-/+ buffers/cache: 319548 3465404

looks sane again. (Using amd64)

[Philip Muškovac (yofel)]

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The bootcharts from my boots.
The only apparent difference to me are the ureadahead and fsck run
times. (Oh, and failsaveX, but I doubt that has anything to do with this)
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[Ian Corne (icorne)]

Another day, another kernel update, no changes. Still eating memory after first reboot

[Dave Gilbert (ubuntu-treblig)]

Is this actually bug 501715:

https://bugs.launchpad.net/ubuntu/+source/ureadahead/+bug/501715