Bug-or-feature: top & 'xxxK shrd'
Hi there,
I haven't found any better explanation, but somehow I have a strange
feeling on top's output:
1:22pm up 17 days, 21:17, 4 users, load average: 2.26, 0.59, 0.19
80 processes: 70 sleeping, 8 running, 0 zombie, 0 stopped
CPU states: 93.9% user, 6.0% system, 0.0% nice, 0.5% idle
Mem: 128044K av, 122444K used, 5600K free, 272464K shrd, 38084K buff
Swap: 128736K av, 0K used, 128736K free 35896K cached
USER PPID PID %CPU VSZ SHRD TT STAT TIME COMMAND
[...]
adabas 1 470 0.0 17176 13836 ? S 0:00 /opt/adabas/pgm/db:sysdb
adabas 470 471 0.0 17176 13836 ? S 0:00 /opt/adabas/pgm/db:sysdb
adabas 470 472 0.0 17176 13836 ? S 0:00 /opt/adabas/pgm/db:sysdb
adabas 470 473 0.0 17176 13844 ? S 0:00 /opt/adabas/pgm/db:sysdb
adabas 470 474 0.0 17180 13852 ? S 0:00 /opt/adabas/pgm/db:sysdb
adabas 470 475 0.0 17180 13864 ? S 0:00 /opt/adabas/pgm/db:sysdb
adabas 470 476 0.0 17236 13912 ? S 0:00 /opt/adabas/pgm/db:sysdb
adabas 470 477 0.0 19984 13872 ? S 0:00 /opt/adabas/pgm/db:sysdb
adabas 470 478 0.0 17232 13864 ? S 0:00 /opt/adabas/pgm/db:sysdb
adabas 470 479 0.0 17232 13864 ? S 0:00 /opt/adabas/pgm/db:sysdb
adabas 470 480 0.0 18624 15308 ? S 0:00 /opt/adabas/pgm/db:sysdb
adabas 475 481 0.0 17180 13860 ? S 0:00 /opt/adabas/pgm/db:sysdb
adabas 475 484 0.0 17180 13856 ? S 0:00 /opt/adabas/pgm/db:sysdb
adabas 475 485 0.0 17180 13860 ? S 0:00 /opt/adabas/pgm/db:sysdb
adabas 475 486 0.0 17180 13856 ? S 0:00 /opt/adabas/pgm/db:sysdb
adabas 475 487 0.0 17180 13860 ? S 0:00 /opt/adabas/pgm/db:sysdb
adabas 475 488 0.0 17180 13856 ? S 0:00 /opt/adabas/pgm/db:sysdb
adabas 475 489 0.0 17180 13868 ? S 0:00 /opt/adabas/pgm/db:sysdb
[...]
I had assumed that 'xxxK shared' is the size of all pages that are used by
two or more processes (without counting those pages as often as there are
processes having access to the page). The output that I have seems to be a
simple addition of the size of shared pages within each process, which
causes quite a huge amount due to the big shared memory pages within the
Adabas D processes.
Now, is that really the desired effect? I mean, what's the '277464K
shrd' info good for except for boasting to those Windoze people?
I'd rather be interested in an output of total shared size, where each
shared page is only listed once...
Benedikt
signoff
---
Benedikt Eric Heinen - Muehlemattstrasse 53 - CH3007 Bern - SWITZERLAND
email: beh@icemark.thenet.ch
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