I usually find when that is happening, something is clobbering the system, very short, very fast, and gone again. Try using htop -d 1 and watching it closely during that stall to see what you see pegging resources. IOwait can be an issue too for that if you have slow disks with something short/fast accessing a chunk of data. I don't notice so much anymore this with 2+ cores on a desktop, but this is/was common for single-core/thead devices (like my android). -mb On 05/25/2013 11:59 AM, Mark Phillips wrote: > I have an old headless server running Linux version 2.6.32-5-686 (Debian > 2.6.32-48squeeze1) (dannf@debian.org ) (gcc > version 4.3.5 (Debian 4.3.5-4) ). Recently, when I log in using ssh the > terminal window freezes for a few seconds, then usually comes back. The > command line stops printing the characters I am typing, the cursor stops > blinking, and then after a few seconds, it comes back. This happens > every few minutes, so it is becoming rather annoying. > > When I check the disks, I get > # df -h > Filesystem Size Used Avail Use% Mounted on > /dev/sda1 182G 42G 131G 25% / > tmpfs 505M 0 505M 0% /lib/init/rw > udev 500M 140K 500M 1% /dev > tmpfs 505M 0 505M 0% /dev/shm > /dev/sdb1 230G 146G 72G 67% /mnt/sdb > > So I am not running out of disk space. > > When I run top, I get this output: > Tasks: 90 total, 3 running, 87 sleeping, 0 stopped, 0 zombie > Cpu(s): 7.0%us, 3.0%sy, 0.0%ni, 82.7%id, 6.6%wa, 0.3%hi, 0.3%si, > 0.0%st > Mem: 1032748k total, 1013748k used, 19000k free, 242992k buffers > Swap: 2017272k total, 1040k used, 2016232k free, 473584k cached > > So I am not running a process that is taking over the CPU. > > How should I go about diagnosing this problem? > > Thanks! > > Mark > > > --------------------------------------------------- > PLUG-discuss mailing list - PLUG-discuss@lists.phxlinux.org > To subscribe, unsubscribe, or to change your mail settings: > http://lists.phxlinux.org/mailman/listinfo/plug-discuss > --------------------------------------------------- PLUG-discuss mailing list - PLUG-discuss@lists.phxlinux.org To subscribe, unsubscribe, or to change your mail settings: http://lists.phxlinux.org/mailman/listinfo/plug-discuss