just found out! it is konsole, unbelievable! going to file a bugreport right now.again, thank you very much for the support.bráulio
On Thu, Sep 4, 2008 at 8:32 PM, Bráulio Barros de Oliveira<brauliobo@xxxxxxxxx> wrote:> but (as always there is), the situation is not good yet when using kde4.> with it, i can't find out which process is accessing the hd, cause> iotop only shows a pdflush access.> i've tried to kill some apps, but it didn't help. any other trace technic?>> regards,> bráulio>> On Thu, Sep 4, 2008 at 8:28 PM, Bráulio Barros de Oliveira> <brauliobo@xxxxxxxxx> wrote:>> hello mat, here comes the results of each action.>> in all the process i've used the iotop (what a great utility you>> pointed!), and always saw only the pdflush process acessing the hd. no>> user interface were used.>> the apm is set to 128 with hdparm>>>> ok, then try the following:>>>> you at least should have noatime,nodiratime,commit=600>>>> :) that did the job! also, i've tested without the commit option,>> which didn't changed the result.>>>> enabled for the reiserfs or >=ext3 filesystems>>>> you can also try data=writeback (but beware this might put your data at risk !)>>>> * can't try>>>> select the anticipatory i/o scheduler>> and set following stuff>>>> :( no change.>>>> echo "16" > /proc/sys/vm/page-cluster>> # default: 3>> #>>>> :( no change.>>>> echo "60" > /proc/sys/vm/swappiness>> # default: 60>> # By default, Linux will aggressively swap processes out of physical memory onto>> disk in order to keep the disk cache as large as possible.>> # This means that pages that haven't been used recently will be pushed into swap>> long before the system even comes close to running out of memory, which is an>> unexpected behavior compared to some operating systems.>> # The /proc/sys/vm/swappiness parameter controls how aggressive Linux is in this>> area.>>>> :( no change.>>>> echo "3000" > /proc/sys/vm/dirty_expire_centisecs>> # default: 3000 (30 seconds)>> #2 how long data can be in the page cache before it is considered expired and>> must be written at the next opportunity. Note that this default is very long: a>> full 30 seconds. That means that under normal circumstances, unless you write>> enough to trigger the other pdflush method, Linux won't actually commit anything>> you write until 30 seconds later.>>>> :( no change.>>>> echo "6000" > /proc/sys/vm/dirty_writeback_centisecs>> # default: 500 (5 seconds)>> #1 how often pdflush wakes up to write data to disk. The default wakes up the>> two (or more) active threads every five seconds.>> # suggestion: 6000 (every 60 seconds)>>>> :( no change.>>>> echo "15" > /proc/sys/vm/dirty_background_ratio>> # default: 10>> #3 Maximum percentage of active memory that can be filled with dirty pages>> before pdflush begins to write them>>>> echo "50" > /proc/sys/vm/dirty_ratio #modified>> # default: 40>> #4 Maximum percentage of total memory that can be filled with dirty pages before>> processes are forced to write dirty buffers themselves during their time slice>> instead of being allowed to do more writes.>> # modified: 50>>>> echo "25" > /proc/sys/vm/vfs_cache_pressure>>>> for i in /sys/block/sd*; do>> /bin/echo "anticipatory" > $i/queue/scheduler>> done>>>> for i in /sys/block/sd*; do>> /bin/echo "0" > $i/queue/iosched/antic_expire>> done>>>> for i in /sys/block/sd*; do>> /bin/echo "150" > $i/queue/iosched/read_expire>> done>>>> for i in /sys/block/sd*; do>> /bin/echo "750" > $i/queue/iosched/read_batch_expire>> done>>>> for i in /sys/block/sd*; do>> /bin/echo "1200" > $i/queue/iosched/write_batch_expire>> done>>>> for i in /sys/block/sd*; do>> /bin/echo "1024" > $i/queue/nr_requests>> done>>>> for i in /sys/block/sd*; do>> /bin/echo "256" > $i/queue/read_ahead_kb>> done>>>> for i in /sys/block/sd*; do>> /bin/echo "256" > $i/queue/max_sectors_kb>> done>>>> for i in /sys/class/scsi_host/host*; do>> /bin/echo "min_power" > $i/link_power_management_policy>> done>>>>>>>>>> try to disable each and every unneeded daemon or applets, programs, etc.>>>> by using:>>>> * powertop>> * iotop>> * htop>> * top>> * lsof | grep /home>> * ...>>>��.n��������+%������w��{.n����z+ �����ܨ}���Ơz�j:+v�����w����ޙ��&�)ߡ�a����z�ޗ���ݢj��w�f
