Maxuproc parameter and number of processes


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# 15  
A Unix-compatible process table is still fixed. Only LWPs are not limited on some OS.
In AIX, according to my link, it is 262144. Not tunable.
Solaris and HP-UX have 30000, tunable.
Linux has 32768, shared with LWPs, tunable.
# 16  
To monitor the maxuproc, I find the user's id with:
Code:
lsuser -a id user

, then use:
Code:
ps -fu $id | wc -l

to count their processes.

--- Post updated at 02:57 PM ---

If you're interested, here's a section of a script I use to monitor every users' current maxuproc.
Code:
numprocs=$(lsattr -El sys0|grep maxuproc|awk '{print $2}')
let threshprocs=$numprocs-50
lsuser -a id ALL > /tmp/maxuproc.tmp
while read uid unum
do
    kount=`ps -fu $uid|wc -l|awk '{print $1}'`
    if (( kount > threshprocs )) then
      echo " High Process Count for User: " $uid
      echo " Exceeds Threshold Value Set in this SCRIPT: " $threshprocs
      echo " Current Process Count: " $kount
      echo " Max Process Count: "     $numprocs
      echo "                    "
      ps -fu $uid
      errors_found="TRUE"
    fi
done  < /tmp/maxuproc.tmp

# 17  
And this is a simplified version of my Nagios check script, that checks user's threads (LWPs) and processes.
Does it run on AIX?
Code:
#!/bin/sh
set -f
PATH=/bin:/usr/bin:/usr/sbin:/sbin

limit=${1:-2850}
plimit=${2:-850}

case $limit$plimit in
*[!0-9]*)
  echo "
Usage: $0 [WARN threads] [WARN processes]"
  exit 3
  ;;
esac

check=`ps -e -L -o user= -o pid= | awk '
{++n[$1]}
p[$2]++==0 {++o[$1]}
END {
 for (u in n) {
  if (n[u]>max) max=n[uid=u]
  if (o[u]>pmax) pmax=o[puid=u]
 }
 if (max>'$limit') {print "uid="uid,"max="max}
 else if (pmax>'$plimit') {print "uid="puid,"pmax="pmax}
}
'`
if [ -z "$check" ]
then
  echo "OK: all users below $limit threads"
  exit 0
else
  eval $check
  if [ -n "$max" ]; then
    echo "WARNING: user $uid runs $max threads"
  elif [ -n "$pmax" ]; then
    echo "WARNING: user $uid runs $pmax processes"
  fi
  exit 1
fi

It can only report one user. If two or more users are above thresholds it reports the top user.
# 18  
Quote:
Originally Posted by MadeInGermany
And this is a simplified version of my Nagios check script, that checks user's threads (LWPs) and processes.
Does it run on AIX?
Code:
#!/bin/sh
set -f
PATH=/bin:/usr/bin:/usr/sbin:/sbin

limit=${1:-2850}
plimit=${2:-850}

case $limit$plimit in
*[!0-9]*)
  echo "
Usage: $0 [WARN threads] [WARN processes]"
  exit 3
  ;;
esac

check=`ps -e -L -o user= -o pid= | awk '
{++n[$1]}
p[$2]++==0 {++o[$1]}
END {
 for (u in n) {
  if (n[u]>max) max=n[uid=u]
  if (o[u]>pmax) pmax=o[puid=u]
 }
 if (max>'$limit') {print "uid="uid,"max="max}
 else if (pmax>'$plimit') {print "uid="puid,"pmax="pmax}
}
'`
if [ -z "$check" ]
then
  echo "OK: all users below $limit threads"
  exit 0
else
  eval $check
  if [ -n "$max" ]; then
    echo "WARNING: user $uid runs $max threads"
  elif [ -n "$pmax" ]; then
    echo "WARNING: user $uid runs $pmax processes"
  fi
  exit 1
fi

It can only report one user. If two or more users are above thresholds it reports the top user.
I don't have an AIX system available to see if your code produces the desired results there, but you might want to consider the following.

Since this code doesn't allow a user to override the default 850 for number of processes unless a first operand is given to specify the number of threads, one might consider changing:
Code:
  echo "
Usage: $0 [WARN threads] [WARN processes]"

to:
Code:
  echo "
Usage: $0 [WARN_threads_count [WARN_processes_count]]" >&2

I added the redirection because this usage statement is a diagnostic that should be written to stderr instead of stdout. I added the underscores and the "count"s so a naive user running your code and seeing your Usage printout would be less likely to think your script was expecting "WARN threads" and "WARN processes" to be literal strings.
This User Gave Thanks to Don Cragun For This Post:
# 19  
Of course your usage text is better.
The original script is named "check_user_threads.sh" and that’s what it did from the beginning. The procs measurement was added later, in a hurry, as Solaris servers with a proc limit (in /etc/system) showed up.
The usage message is sent to stdout on purpose, because stdout *must* go to the Nagios console. Not so with stderr. But maybe it works meanwhile.?
This User Gave Thanks to MadeInGermany For This Post:
# 20  
Quote:
Originally Posted by MadeInGermany
Of course your usage text is better.
The original script is named "check_user_threads.sh" and that’s what it did from the beginning. The procs measurement was added later, in a hurry, as Solaris servers with a proc limit (in /etc/system) showed up.
The usage message is sent to stdout on purpose, because stdout *must* go to the Nagios console. Not so with stderr. But maybe it works meanwhile.?
Hi MadeInGermany,
Thanks for the information. I'm just used to writing utilities that work directly on BSD, Linux, and UNX platforms where we all know what is supposed to happen and users know how to separate diagnostics from normal output. I hate using things like Nagios that think that diagnostic messages should be hidden from users (making it hard or impossible for those users to find out what went wrong when underlying utilities report problems)

Oh, well.

Cheers,
Don
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