linux RAM memory.howto.md
ps -aux | sort +5n
Example1:
19:48> vmstat -d <epcim@dontpanic:~
disk- ------------reads------------ ------------writes----------- -----IO------
total merged sectors ms total merged sectors ms cur sec
ram0 0 0 0 0 0 0 0 0 0 0
ram1 0 0 0 0 0 0 0 0 0 0
ram2 0 0 0 0 0 0 0 0 0 0
ram3 0 0 0 0 0 0 0 0 0 0
ram4 0 0 0 0 0 0 0 0 0 0
ram5 0 0 0 0 0 0 0 0 0 0
ram6 0 0 0 0 0 0 0 0 0 0
ram7 0 0 0 0 0 0 0 0 0 0
ram8 0 0 0 0 0 0 0 0 0 0
ram9 0 0 0 0 0 0 0 0 0 0
ram10 0 0 0 0 0 0 0 0 0 0
ram11 0 0 0 0 0 0 0 0 0 0
ram12 0 0 0 0 0 0 0 0 0 0
ram13 0 0 0 0 0 0 0 0 0 0
ram14 0 0 0 0 0 0 0 0 0 0
ram15 0 0 0 0 0 0 0 0 0 0
hda 1747423 1722507 34275438 33491725 398011 2035996 18926226 72280827 0 9887
hdc 10 0 40 12 0 0 0 0 0 0
md0 0 0 0 0 0 0 0 0 0 0
sda 134911 298261 3396924 2170705 77326 4327021 6808781 478157869 0 1694
Example2:
19:48> vmstat -D <epcim@dontpanic:~
20 disks
6 partitions
1882345 total reads
2020768 merged reads
37672410 read sectors
35662455 milli reading
475337 writes
6363017 merged writes
25735007 written sectors
550438696 milli writing
0 inprogress IO
11581 milli spent IO
19:49> vmstat -s <epcim@dontpanic:~
1035228 total memory
588612 used memory
518728 active memory
19612 inactive memory
446616 free memory
2180 buffer memory
124376 swap cache
1028112 total swap
508080 used swap
520032 free swap
651151 non-nice user cpu ticks
1947 nice user cpu ticks
350782 system cpu ticks
2739314 idle cpu ticks
978660 IO-wait cpu ticks
9528 IRQ cpu ticks
0 softirq cpu ticks
18836245 pages paged in
12867683 pages paged out
905866 pages swapped in
657287 pages swapped out
57858211 interrupts
172058571 CPU context switches
1144039230 boot time
1497416 forks
Example3:
19:49> vmstat -a <epcim@dontpanic:~
procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----
r b swpd free inact active si so bi bo in cs us sy id wa
0 0 508080 449408 17196 518396 77 56 398 272 315 6 14 8 58 21
19:51> /usr/bin/iostat -k -t -x <epcim@dontpanic:~
Linux 2.6.9-22.0.2.EL (dontpanic.cz.ibm.com) 04/03/2006
Time: 07:55:29 PM
avg-cpu: %user %nice %sys %iowait %idle
13.74 0.04 7.60 20.69 57.92
Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util
hda 36.15 42.79 36.96 8.38 724.06 397.98 362.03 198.99 24.75 2.23 49.04 4.60 20.86
hdc 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 4.00 0.00 1.20 1.20 0.00
sda 6.34 90.74 2.86 1.63 72.21 143.03 36.11 71.51 47.86 10.07 2239.82 7.99 3.60