Hi, I'd like to have some information about memory usage and how to improve it.
First, I have a PowerBook under Debian, with 256 MB RAM (physical memory) and 512 MB swap. As this machine often swaps, I did some tests, doing the sum Mem used + Swap used with the "top" command: Booting and logging in ... 184 MB (main daemons + apache2 + innd + spamd) Stopping spamd daemon .... 148 MB Starting X (Xorg) ........ 231 MB (fvwm2 + ROX-Filer + Liferea + 3 xterm) Exec emacs / quit ........ 241 MB Firefox with 28 tabs ..... 251 MB Exec emacs / quit ........ 247 MB I'd like to know if all these figures seem to be normal. Well, I assume that one can't deduce very much concerning memory that can be required when using applications, due to the fact that some parts of the program code are not taken into account. Are there other good tools to analyze the memory usage? Also, after using some programs taking a lot of memory, like dpkg (possibly via apt-get), all the other programs data are swapped out, and simple operations such as making a menu appear can take several dozens of seconds. Is there a way to improve that, e.g. by limiting the physical memory used (if possible under a 2.6.x kernel)? I've also looked at another machine (remotely), this time under x86, and here's the output of "top", with processes ordered by memory usage. The total memory used (1747944k) really seems to be strange. top - 16:41:20 up 7 days, 5:59, 1 user, load average: 0.00, 0.00, 0.00 Tasks: 67 total, 2 running, 65 sleeping, 0 stopped, 0 zombie Cpu(s): 0.0% us, 0.0% sy, 0.0% ni, 100.0% id, 0.0% wa, 0.0% hi, 0.0% si Mem: 2066448k total, 1747944k used, 318504k free, 330296k buffers Swap: 2096472k total, 0k used, 2096472k free, 913808k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 26338 vlefevre 16 0 56568 51m 2072 S 0.0 2.5 0:31.93 mutt 1265 root 21 5 27308 24m 2068 S 0.0 1.2 0:00.53 spamd 1537 root 21 5 27308 22m 604 S 0.0 1.1 0:00.00 spamd 1538 root 21 5 27308 22m 524 S 0.0 1.1 0:00.00 spamd 1539 dictd 17 0 46788 10m 9080 S 0.0 0.5 0:00.03 dictd 2083 vlefevre 16 0 11128 6776 2944 S 0.0 0.3 0:01.79 mutt 1679 root 18 0 12960 4504 1124 S 0.0 0.2 0:00.10 Xprt 27446 root 16 0 11304 3796 1812 S 0.0 0.2 0:00.00 apache2 1774 ntp 16 0 3584 3584 2916 S 0.0 0.2 0:00.01 ntpd 13835 vlefevre 16 0 6812 3264 1636 S 0.0 0.2 0:00.32 zsh 26279 vlefevre 16 0 6716 3252 1652 S 0.0 0.2 0:00.07 zsh 27449 www-data 23 0 11440 3056 1044 S 0.0 0.1 0:00.00 apache2 27450 www-data 17 0 11440 3056 1044 S 0.0 0.1 0:00.00 apache2 27451 www-data 21 0 11440 3056 1044 S 0.0 0.1 0:00.00 apache2 27452 www-data 18 0 11440 3056 1044 S 0.0 0.1 0:00.00 apache2 27453 www-data 15 0 11440 3056 1044 S 0.0 0.1 0:00.00 apache2 1234 bind 18 0 29952 2568 1732 S 0.0 0.1 0:00.01 named 13832 root 15 0 7368 2488 2052 S 0.0 0.1 0:00.01 sshd 13834 vlefevre 16 0 7528 1600 1144 R 0.0 0.1 0:00.00 sshd 2082 vlefevre 16 0 5244 1572 728 S 0.0 0.1 0:00.85 screen 1224 root 15 0 2476 1356 372 S 0.0 0.1 0:00.04 klogd 1595 daemon 16 0 4704 1288 884 S 0.0 0.1 0:00.06 lpd 1398 root 16 0 2228 1200 664 S 0.0 0.1 0:00.08 automount 1454 root 16 0 2224 1184 664 S 0.0 0.1 0:00.00 automount 1526 root 16 0 2136 1084 580 S 0.0 0.1 0:00.00 automount [...] -- Vincent Lefèvre <[EMAIL PROTECTED]> - Web: <http://www.vinc17.org/> 100% accessible validated (X)HTML - Blog: <http://www.vinc17.org/blog/> Work: CR INRIA - computer arithmetic / SPACES project at LORIA -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
