Get the output of below commands
1. cat /proc/meminfo
2. ps -A --sort -rss -o comm,pmem | head -n 11
3. ps -A --sort -rss -o pid,comm,pmem,rss
4. free -m
5.
2. COMMAND
ps -A --sort -rss -o comm,pmem | head -n 11
RESULT
COMMAND %MEM
java 13.4
java 11.8
java 10.7
java 5.8
java 5.1
java 5.0
emagent 0.5
java 0.3
perl 0.0
ntpd 0.0
The java / weblogic processes are using only 52.1% of the total memory
4. COMMAND
free -m
RESULT
total used free shared buffers cached
Mem: 56378 55716 662 0 175 3245
-/+ buffers/cache: 52295 4083
Swap: 4094 0 4094
When you run free command, look for the line which says “-/+ buffers/cache”. This line which shows numbers under used and free, is the RAM you literally have used and literally
have free because of ram allocated to cache and buffers,
this is the line you should refer to when you want to see how much free RAM you have because RAM allocated to buffers and cache will be instantly released and given to a
process whenever it needs it.
So you have 4GB RAM free now.
5. COMMAND
RESULT
COMMAND %MEM RSS
java 13.4 7610.14
java 11.8 6686.60
java 10.7 6088.11
java 5.8 3274.82
java 5.1 2893.45
java 5.0 2821.26
emagent 0.5 312.08
java 0.3 175.11
perl 0.0 9.97
ntpd 0.0 4.78
RSS is the portion of memory that a process is using that is held in pysical RAM and is calculated in kb's.
6. COMMAND
ps -aux
RESULT
Warning: bad syntax, perhaps a bogus '-'? See /usr/share/doc/procps-3.2.7/FAQ
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 0.0 2064 620 ? Ss Oct20 0:03 init [5]
root 2 0.0 0.0 0 0 ? S< Oct20 0:00 [migration/0]
root 3 0.0 0.0 0 0 ? SN Oct20 0:00 [ksoftirqd/0]
root 4 0.0 0.0 0 0 ? S< Oct20 0:00 [watchdog/0]
shows you the rss memory as well as the virtual memory of all the pid's, you may then look for your respective pid in the list.
Please note that here the VSZ - virtual size is in kilobytes, RSS - real memory size is in byte units.
Some useful AIX commands:
svmon -Pg -t 1 |grep Pid ; svmon -Pg -t 10 |grep "N" top 10 processes using the most paging space
svmon -P -O sortseg=pgsp shows paging space usage of processes
ps gv | head -n 1; ps gv | egrep -v "RSS" | sort +6b -7 -n -r
1. cat /proc/meminfo
2. ps -A --sort -rss -o comm,pmem | head -n 11
3. ps -A --sort -rss -o pid,comm,pmem,rss
4. free -m
5.
while read command percent rss; do if [[ "${command}" != "COMMAND"
]]; then rss="$(bc <<< "scale=2;${rss}/1024")"; fi; printf
"%-26s%-8s%s\n" "${command}" "${percent}" "${rss}"; done < <(ps -A
--sort -rss -o comm,pmem,rss | head -n 11)6. ps -aux 2. COMMAND
ps -A --sort -rss -o comm,pmem | head -n 11
RESULT
COMMAND %MEM
java 13.4
java 11.8
java 10.7
java 5.8
java 5.1
java 5.0
emagent 0.5
java 0.3
perl 0.0
ntpd 0.0
The java / weblogic processes are using only 52.1% of the total memory
4. COMMAND
free -m
RESULT
total used free shared buffers cached
Mem: 56378 55716 662 0 175 3245
-/+ buffers/cache: 52295 4083
Swap: 4094 0 4094
When you run free command, look for the line which says “-/+ buffers/cache”. This line which shows numbers under used and free, is the RAM you literally have used and literally
have free because of ram allocated to cache and buffers,
this is the line you should refer to when you want to see how much free RAM you have because RAM allocated to buffers and cache will be instantly released and given to a
process whenever it needs it.
So you have 4GB RAM free now.
5. COMMAND
while read command percent rss; do if [[ "${command}" != "COMMAND"
]]; then rss="$(bc <<< "scale=2;${rss}/1024")"; fi; printf
"%-26s%-8s%s\n" "${command}" "${percent}" "${rss}"; done < <(ps -A
--sort -rss -o comm,pmem,rss | head -n 11)RESULT
COMMAND %MEM RSS
java 13.4 7610.14
java 11.8 6686.60
java 10.7 6088.11
java 5.8 3274.82
java 5.1 2893.45
java 5.0 2821.26
emagent 0.5 312.08
java 0.3 175.11
perl 0.0 9.97
ntpd 0.0 4.78
RSS is the portion of memory that a process is using that is held in pysical RAM and is calculated in kb's.
6. COMMAND
ps -aux
RESULT
Warning: bad syntax, perhaps a bogus '-'? See /usr/share/doc/procps-3.2.7/FAQ
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
root 1 0.0 0.0 2064 620 ? Ss Oct20 0:03 init [5]
root 2 0.0 0.0 0 0 ? S< Oct20 0:00 [migration/0]
root 3 0.0 0.0 0 0 ? SN Oct20 0:00 [ksoftirqd/0]
root 4 0.0 0.0 0 0 ? S< Oct20 0:00 [watchdog/0]
shows you the rss memory as well as the virtual memory of all the pid's, you may then look for your respective pid in the list.
Please note that here the VSZ - virtual size is in kilobytes, RSS - real memory size is in byte units.
Some useful AIX commands:
svmon -Pg -t 1 |grep Pid ; svmon -Pg -t 10 |grep "N" top 10 processes using the most paging space
svmon -P -O sortseg=pgsp shows paging space usage of processes
ps gv | head -n 1; ps gv | egrep -v "RSS" | sort +6b -7 -n -r
