How can I see the free memory on an AIX? There is no free -m under it.
AIX oslevel: 6100-03-03-0943
- Your AIX server won't have any free memory. It will have memory in use by applications and memory in use for filesystem cache. If you look at tools like topas, nmon, etc. they will all show nearly all of physical memory in use all the time. My question is, what are you trying to find out.EightBitTony– EightBitTony2011-12-16 14:35:17 +00:00Commented Dec 16, 2011 at 14:35
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5 Answers
svmon e.g.
# svmon size inuse free pin virtual memory 131072 114552 16520 34191 151562 pg space 655360 78472 work pers clnt other pin 30911 6 0 3274 in use 83264 31288 0 or vmstat as already shown (vmstat -v)
- 3I always use
svmon -G -O unit=MBas that's the only way to get the additional column available which shows the amount of memory, that applications can request. Nice sideeffect is that it will show the amounts in MB, I still cannot get around with 512k blocks :)doktor5000– doktor50002015-04-18 11:43:21 +00:00Commented Apr 18, 2015 at 11:43
Use this:
lsattr -El mem0 vmstat -v 
Create a script something like checkmemory.sh and place the following code:
#!/usr/bin/ksh #memory calculator um=`svmon -G | head -2|tail -1| awk {'print $3'}` um=`expr $um / 256` tm=`lsattr -El sys0 -a realmem | awk {'print $2'}` tm=`expr $tm / 1000` fm=`expr $tm - $um` echo "\n\n-----------------------"; echo "System : (`hostname`)"; echo "-----------------------\n\n"; echo "\n\n-----------------------"; echo " Users Login information \n"; for ENTRY in `finger | cut -d " " -f1 | grep -v Login | uniq` do echo "`finger -l $ENTRY | head -1 | cut -d \" \" -f14` ---> `finger -l $ENTRY | awk '{ print $2 }' | tail -2 | head -1`"; #finger -l $ENTRY | awk '{ print $2 }' | tail -2 | head -1; done echo "-----------------------\n"; echo "\n----------------------"; echo "Memory Information\n\n"; echo "total memory = $tm MB" echo "free memory = $fm MB" echo "used memory = $um MB" echo "\n\n-----------------------\n"; It will display the total, free and used memory of the system as well as remote logged in users.
this command will display result in "GB"
svmon -G -O unit=GB if you want in "MB", just change the unit value to MB
# lparstat -i |egrep -i "Online|Maximum" |grep -i Memory Online Memory : 49152 MB Maximum Memory : 73728 MB 
