Bad performance
sebastian ssmoller
sebastian.ssmoller at gmx.net
Wed Sep 17 11:13:30 PDT 2003
(...)
hi,
> I agree with the general concensus that this shows all the symptoms of
> a network or DNS problem - though the switch from SIS to nVidia may
> have disturbed X.
>
> Did you change any system configuration (hostname etc) when you moved
> the disk? Is the 'production' environment identical network-wise to
> your test environment? Have you re-configured X to use the different
> video card?
when i moved the disk i didn't change any network setting. the only
difference is that the "prod." system has two network cards (both
realtek).
i first configured X to use the native nvidia driver but now i am
running the X11 "builtin" nvidia driver. Seems to make no difference in
performance for me.
> How are you starting gdm, gnome2 etc? I gather gdm isn't started
> via /etc/ttys but manually from a vty. I presume you are using gdm
> to start X.
i start gdm using /usr/X11R6/etc/rc.d/gdm.sh as mentioned in docs.
to give u some numbers:
-starting gdm takes 30 s from command line to login screen
(see last post: only 15s with acpi disabled (why?) )
-starting gnome2 takes 25 s from login until nautilus has drawn the
desktop
i guess this is not really fast, isnt it ?
> Can you log in from a second system? If so, what is happening during
> the startup delay? Does top show the system is very heavily loaded or
> doing nothing (all processes waiting)?
>
good idea i havnt tried this yet. i ll do theses days ...
> Before you start gdm, can you ping your system by hostname? Are there
> any other hostname mentioned in your gdm configuration file? Can you
> ping them all?
>
i looked at the /usr/X11R6/etc/gdm/gdm.conf file but i havnt found any
hostname specific setting. what exactly shall i look for ?
> Have you checked your /etc/nsswitch.conf and /etc/resolv.conf? Is the
> output from 'ifconfig -a' and 'netstat -r' correct?
>
after i have fixed some bugs in named config now ipconfig -a and netstat
-r output is ok and both answer in no time (means to timeout).
> Have a look through all the files in /var/log that have been updated
> recently and check for errors - especially XFree86.0.log, daemon and
> messages. Have a look in the gdm log file (I'm not sure where this
> is by default). Are there any messages on either the console or
> vty from which you started gdm? (Use Ctrl-Alt-Fn to get from X to
> vtyn and then Alt-Fn to switch between vtys. You can use ScrollLock
> and PgUp/PgDn/Up/Down to scroll back. Press ScrollLock again to
> get back to normal).
>
i had a first look at the config files u named but i could not see any
interesting error or warning. i will check this in detail later.
> Is any part of your system NFS-mounted? Is X using a fontserver?
> Are all these servers responding?
currently i do not run nfs (client/server) or fontserver.
> Are you running a GENERIC or custom kernel? Do you have any firewall
> functions enabled?
i use a custom kernel. i have removed some scsi devices cause i am
running an ide system. and i moved this debugging stuff.
the firewall is not running on startup cause i use a dial up connection.
btw: the mozilla-firebird performance problem mention earlier seems to
be something different: firebird launches relativly fast and as soon as
running i can us the menus and everything which is reachable via mouse.
but as soon as i use the keyboard (e.g. typing an internet addr) or
switch the window into background and back into foreground moz-firebird
hangs for minutes (!). but this only happens the first time after
start. when it runs it performs rather good
i will try to build a new version these days and will see what happens
...
thx for ur hints
seb
> Peter
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