On Sat, May 30, 2009 at 5:35 AM, Klaus Jantzen <k.d.jant...@t-online.de>wrote:
> On 05/29/2009 02:58 AM, Michael Yang wrote: > > Hi, > > I have my laptop installed with Debian for two years. It's been working > fine, although some problems happened and got fixed. (Now is Lenny, 2.6.24, > Xfce4). The system has been very stable, but just with performance issues > now. The time to start the system is OK (usually about 22secs in bootchart). > The issue is with GUI applications. When I entered xfce4, it takes about > 14secs for everything is ready, and when I open the Firefox (or Mozilla > product), it always takes about 15secs to 20secs to be ready. > > It looks as if you have the same problem as I encountered with Firefox: > due to some problem with IPv6 handling > Firefox becomes slow. I'll pass on two remidies which I received. > > 1) rimaya sent me the following tip, which worked: > > As root you enter on a console > > echo "blacklist ipv6" >> /etc/modprobe.d/blacklist > > and restart your PC. > Yes, actually I disabled ipv6 at the very beginning of my system installation. My performance issue is not only in firefox, but in all X11 apps. I don't know how to tune or diagnose the X11 problem related to performance issues. Thanks, Michael. > > > 2) In Firefox enter as address > > about:config > > You will see a very long list of variable set for Firefox. > Find the entry > > network.dns.disableIPv6 > > If it is set to "false" click on it twice to change it to "true". > Close the window and Firefox. > > Modification 1) was sufficient for me. I do not know whether mod 2) alone > is sufficient; > I did both. > > > The system may be getting slower because I have been configuring and > installing new staff on it. I just wonder if there is any way to tune on it, > or maybe somewhere many caches need to be cleaned up? > > I also used ext3 (journal) as my file system when I first time installed > the system. This may be another factor of the issue. For sake of safety, I > don't know how to remove the journal features without damaging my system > with minimum risks. Any expertise can give advice and guidance on this if it > can improve the performance a lot? > > Thanks, > Michael. > > HTH. > > -- > > K. Jantzen >
