There are two things to determine:
How your machine is doing
What does the DM use
What the impact of FV will be
You should use 'vmstat' (ignoring the first line of data; it's garbage) on
your machine as is. The free memory column tells you how much RAM you are
using now. The paging columns tell you if the machine is using the disk as
virtual memory (this is not a good thing since RAM is cheap and virtual
memory eats CPU cycles).
For example, this output from vmstat tell me that my machine has 45MB free.
1AW51C# vmstat 5 30
procs memory page disk faults cpu
r b w swap free re mf pi po fr de sr m0 m1 m2 m3 in sy cs us sy
id
0 0 0 268072 61996 0 11 3 0 0 0 0 0 0 0 0 31 484 301 0 1
99 # Ignore this one
0 0 0 257204 45004 0 3 0 0 0 0 0 0 0 0 0 36 529 319 0 1
99
The ps command reports that the DM requries about 3MB for the first instance
and probably less for more. (I didn't check). The DM could be either dm_wp50
or default_dm on your system. Use the following to see which DM is your
default DM:
sum /usr/fox/wp/bin/dm_wp50 /opt/fox/wp/bin/default_dm
/opt/fox/wp/FoxView/foxview
At this point, we know what you have free and what the DM needs. Now, for
FoxView.
According to the ps command, FoxView (default_dm on my 51c) requires 11.723
MB of RAM.
ps -el | head ; echo ... ; ps -el | grep default_
F S UID PID PPID C PRI NI ADDR SZ WCHAN TTY TIME CMD
19 T 0 0 0 0 0 SY f0271b28 0 ? 0:00
sched
8 S 0 1 0 0 41 20 f5bab678 106 f5bab848 ? 0:00 init
19 S 0 2 0 0 0 SY f5bb29a0 0 f0288f48 ? 0:00
pageout
19 S 0 3 0 0 0 SY f5bb2340 0 f028d1bc ? 0:23
fsflush
8 S 0 1778 1 0 41 20 f5bb1ce0 340 f5baa814 ? 0:00 sac
8 S 0 1779 1 0 61 20 f5bb1680 355 f591f3d6 ? 0:00
ttymon
8 S 0 982 975 0 55 20 f5bb1020 354 f611ee0e ? 0:00
lpNet
8 S 0 914 1 0 77 20 f5fa3988 418 f591f21e ? 0:00
statd
8 S 0 894 1 0 41 20 f5d0e660 461 f591f35e ? 0:00
rpcbind
...
8 S 0 1532 1091 0 50 20 f63cf020 11723 f633c8c6 ? 0:05
default_
The program top reports 12 MBytes.
However, this memory includes both the data portion of the program and the
code portion. The code is shared.
So, I ran vmstat(1) at 5 second intervals for 30 iterations with one
FoxView, then 2, then back to one.
As you can see, the second instance required about 6MB of new RAM. The
stated requirement is 8MB of RAM per FV instance.
1AW51C# vmstat 5 30
procs memory page disk faults cpu
r b w swap free re mf pi po fr de sr m0 m1 m2 m3 in sy cs us sy
id
0 0 0 268072 61996 0 11 3 0 0 0 0 0 0 0 0 31 484 301 0 1
99 # Ignore this one
0 0 0 257204 45004 0 3 0 0 0 0 0 0 0 0 0 36 529 319 0 1
99 # Single instance
0 0 0 257204 45004 0 0 0 0 0 0 0 2 0 1 0 93 618 347 2 2
96
0 0 0 257204 45004 0 0 0 0 0 0 0 0 0 0 0 35 527 313 0 1
99
0 0 0 252392 42036 0 300 0 0 0 0 0 0 0 0 0 95 3080 546 55 24
21
0 0 0 249268 39288 0 18 0 0 0 0 0 0 0 0 0 60 2008 432 13 4
83 # Second started
0 0 0 249108 39244 0 0 0 0 0 0 0 0 0 0 0 48 696 344 0 0
100
0 0 0 249108 39244 0 0 0 0 0 0 0 0 0 0 0 50 689 341 0 0
100
0 0 0 249108 39244 0 1 0 0 0 0 0 0 0 0 0 74 789 383 0 0
99
0 0 0 249108 39244 0 0 0 0 0 0 0 2 0 0 0 91 749 356 1 1
98
0 0 0 249108 39244 0 0 0 0 0 0 0 0 0 0 0 50 696 344 0 0
100
0 0 0 249100 39240 0 0 0 0 0 0 0 0 0 0 0 48 698 343 0 0
100
0 0 0 249100 39240 0 0 0 0 0 0 0 0 0 0 0 54 693 344 0 1
99
0 0 0 249096 39236 0 1 0 0 0 0 0 0 0 0 0 55 742 370 1 0
99
0 0 0 253916 42620 0 0 0 0 0 0 0 0 0 0 0 38 563 319 1 2
97 # Second stopped
0 0 0 257132 44884 0 0 0 0 0 0 0 0 0 0 0 25 497 302 0 0
100
0 0 0 257132 44884 0 0 0 0 0 0 0 0 0 0 0 25 488 300 0 0
100
0 0 0 257132 44884 0 0 0 0 0 0 0 0 0 0 0 27 525 303 0 1
99
0 0 0 257132 44884 0 0 0 0 0 0 0 0 0 0 0 47 534 331 0 0
99
Now, you know what capacity your machine has and what FV will demand and can
do the arithmetic.
Note, the id column can be used to view the impact on CPU time of mulitple
FVs and of FV vs. DM.
One last item, FV requires a lot of disk space in /opt. So check your /opt
partition for free space:
df -F ufs -k
Regards,
Alex Johnson
10707 Haddington
Houston, TX 77043
713.722.2859 (office)
713.722.2700 (switchboard)
713.932.0222 (fax)
[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]>
-----Original Message-----
From: [EMAIL PROTECTED] [SMTP:[EMAIL PROTECTED]]
Sent: Thursday, April 26, 2001 9:08 AM
To: [EMAIL PROTECTED]
Subject: Minimun RAM for FoxView
We are to change our IA system (AW51B with 4.3 software) from DM to
FoxView (and 6.2.1 software).
We have only 32 Mb in some of our WP and 64 Mb in our AW.
What's the experience of the Users about the "real" minimun RAM
required (and disk space) to work with two FoxViews per station? Foxboro, in
the installation Notes of this version, ask for only 32 Mb but we think that
is not a "real" number...
Thank you in advance and best regards.
Pedro Hernandez
Process Control Manager
REPSOL-YPF Quimica
Puertollano (C.Real)
SPAIN
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