Top command

Hi experts;
Linux is running on IBM Blade server & oracle 11gR1 is running .. when I run "Top" at shell it shows approx 95% of CPU is being used by oracle user.
When I see at COMMAND it shows oracle
I mean that >> User > Oracle is using almost 100% by COMMAND oracle.
I am confused.
How can I find that what oracle is using ??
Regards

You can press the letter 'c' in top to toggle between "command line" and "program name".
A CPU usage of 99 % is not necessarily a problem. If a system has resources available it would be foolish not to allocate all available resources to a process that demands it. If the general system response is slow, you have a problem with a bad process or hardware error that prevents proper resource allocation, or your system does not have the appropriate hardware or configuration to efficiently handle the requested tasks.
If you want to know what an oracle user or Oracle Database is doing, you need to check this from within the Oracle database.

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Query on Linux 'top' command in Linux for oracle user

This is the output of 'top' command in one of my linux server hosting One Oracle instance with 600MB SGA and 400MB PGA. One one instance is up in this server.
top - 14:36:37 up 4:26, 3 users, load average: 0.05, 0.11, 0.28
Tasks: 124 total, 1 running, 123 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.2% us, 0.1% sy, 0.0% ni, 66.6% id, 33.1% wa, 0.0% hi, 0.0% si
Mem: 12299332k total, *2569836k* used, 9729496k free, 61288k buffers
Swap: 20972816k total, 0k used, 20972816k free, 2274852k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
6345 oracle 16 0 37132 1752 1172 S 0.0 0.0 0:00.08 sshd
6346 oracle 16 0 54004 1536 1208 S 0.0 0.0 0:00.02 bash
6423 oracle 16 0 45376 10m 6228 S 0.0 0.1 0:00.25 tnslsnr
6471 oracle 16 0 740m 17m 13m S 0.0 0.1 0:00.02 oracle
6473 oracle 16 0 739m 15m 12m S 0.0 0.1 0:00.01 oracle
6475 oracle 16 0 739m 32m 29m S 0.0 0.3 0:00.07 oracle
6477 oracle 16 0 742m 50m 44m S 0.0 0.4 0:00.27 oracle
6479 oracle 16 0 754m 23m 19m S 0.0 0.2 0:00.43 oracle
6481 oracle 16 0 739m 24m 20m S 0.0 0.2 0:00.61 oracle
6483 oracle 16 0 740m 88m 83m S 0.0 0.7 0:00.71 oracle
6485 oracle 16 0 739m 22m 19m S 0.0 0.2 0:00.01 oracle
6487 oracle 16 0 740m 30m 25m S 0.0 0.3 0:00.15 oracle
6489 oracle 16 0 741m 55m 48m S 0.0 0.5 0:00.29 oracle
6491 oracle 16 0 739m 24m 20m S 0.0 0.2 0:00.01 oracle
6493 oracle 16 0 739m 15m 11m S 0.0 0.1 0:00.01 oracle
6495 oracle 16 0 739m 14m 11m S 0.0 0.1 0:00.00 oracle
6622 oracle 16 0 739m 16m 13m S 0.0 0.1 0:00.00 oracle
6626 oracle 16 0 740m 79m 74m S 0.0 0.7 0:01.95 oracle
6636 oracle 16 0 740m 28m 23m S 0.0 0.2 0:00.06 oracle
6638 oracle 16 0 739m 16m 12m S 0.0 0.1 0:00.01 oracle
6846 oracle 16 0 739m 19m 16m S 0.0 0.2 0:00.02 oracle
6848 oracle 16 0 739m 24m 21m S 0.0 0.2 0:00.04 oracle
6850 oracle 16 0 739m 19m 16m S 0.0 0.2 0:00.02 oracle
6852 oracle 16 0 739m 19m 16m S 0.0 0.2 0:00.01 oracle
6854 oracle 16 0 739m 30m 26m S 0.0 0.3 0:00.12 oracle
6856 oracle 15 0 739m 28m 24m S 0.0 0.2 0:00.18 oracle
6858 oracle 15 0 740m 40m 35m S 0.0 0.3 0:06.39 oracle
6862 oracle 16 0 739m 32m 28m S 0.0 0.3 0:02.25 oracle
6864 oracle 16 0 739m 19m 16m S 0.0 0.2 0:00.02 oracle
6866 oracle 16 0 739m 19m 16m S 0.0 0.2 0:00.03 oracle
6868 oracle 16 0 739m 19m 16m S 0.0 0.2 0:00.02 oracle
7480 oracle 15 0 37264 1668 1092 S 0.0 0.0 0:00.15 sshd
7481 oracle 15 0 54004 1528 1196 S 0.0 0.0 0:00.05 bash
10333 oracle 16 0 739m 20m 16m S 0.0 0.2 0:00.00 oracle
10337 oracle 15 0 6168 1080 768 R 0.0 0.0 0:00.00 top
Total RAM as seen from top command is 12G.
*2569836* - Total RAM which is being used currently .
How can I see the total RAM used by all Oracle Processes running in this server. The server is Linux X86 64 Bit. Can I sum up the values under 'VIRT' column of 'top' command to see the total RAM used ?
Is there a way to see the total RAM and CPU used by Oracle from top ?
'VIRT' is the virtual memory - In what way is this related to the figure above, which is the physical memory (RAM) ?
Thanks in Advance
SSN
Edited by: SSNair on Oct 21, 2010 2:39 AM

Oracle used shared memory to implement the SGA, which constituted the largest memory consumption of the Oracle instance. The problem is that in many modern OS, including linux, it is hard to define the actual memory usage fo a software. This is because the memory used by a process is actually composed of shared (e.g., shared memory, shared library, executable code) and private (e.g., the heap, the stack) components. Utilities like top, ps, etc reports all memory visible by a process, disregarding whether it is shared or not. As a result, the total of VIRT etc will be inflated by the shared components. For a more accurate figure of memory usage, shared memory / library / code should be counted once.
Before 11g, Oracle used System V ipc, and the amount of memory allocated can be checked using ipcs. In 11g, Oracle switched to /dev/shm, use df to check the memory allocation. (Thanks user11150436)
The "Mem used" figure in top is the actual usage of the memory: shared memory and library are not multi-counted. However, Linux will always cache (read before actually requested) and buffer (write after signalling completion) disk I/O. Therefore, "Mem used" is almost always very close to the amount of physical memory. "Mem used" - "buffers" - "cached" reflects the memory actually used by the OS and all programs more accuately.
And you can use the pmap utility to check the memory map. Then you classify the sharable and unsharable memory usage to calculate a more accurate result suiting your need. You need OS knowledge to understand the output.

How to find the contents of proc from top command

I had a doubt related to how to find the contents of a procedure or the statements from the PID displayed in top command if it can be done from TOAD or
sqlplus. If we can find out the details from top like:-
21211 oracle 16 0 3228 1012 764 R 0 0.0 0:07.68 top
1 root 16 0 1732 552 472 S 0 0.0 0:01.29 init
say, what is the process with PID 21211 and 1 are doing?
I hope, my question is clear.
Please, help in solving the doubt.
regards

Join v$process, v$session, and v$sql
SQL> ed
Zapisano file afiedt.buf
1 SELECT p.pid, s.sid, s.serial#, sq.sql_text
2    FROM v$session s,
3      v$process p,
4      v$sql sq
5    WHERE s.paddr = p.addr
6*   AND sq.address = s.sql_address
SQL> /
       PID        SID    SERIAL# SQL_TEXT
        37        128          2 BEGIN EMD_NOTIFICATION.QUEUE_READY(:1, :
                                 2, :3); END;
        19        149       4566 SELECT p.pid, s.sid, s.serial#, sq.sql_t
                                 ext   FROM v$session s,     v$process p,
                                      v$sql sq   WHERE s.paddr = p.addr
                                  AND sq.address = s.sql_address
SQL>Edited by: Łukasz Mastalerz on Feb 12, 2009 1:27 PM

Running Top command in Java

hi friends,
when i run Top command in Linux from java by using Runtime.getRuntime.exec(), it is giving the following error---
top: tcgetattr() failed : Invalid Argument
While this command is working properly from shell.

when i run Top command in Linux from java by using
Runtime.getRuntime.exec(), it is giving the following
error---
top: tcgetattr() failed : Invalid Argument
command is working properly from shell.top needs a terminal to run; it's a silly and ugly little program. When you
fire up a process using the exec() method you don't have a terminal
environment for the process. Try to run 'ps' instead.
kind regards,
Jos

How to see rest of output of TOP command

launch Terminal
run the top command
how to view the rest of its output ?
yeah resizing the window helps. But it still wont show all.
Best to you !

Use Applications -> Utilities -> Activity Monitor ?
The 'ps' command ?
top -l 100 # that is lowercase L - see "man top"

0% idle time of cpu states from top command in oracle 8i /solaris 5.9

Hi,
for long time idle time is 0% in top command :
database version:oracle 8.1.7.4.0
operating system : sun solaris 5.9
load averages: 9.32, 5.78, 6.13 15:22:13
404 processes: 387 sleeping, 13 running, 4 on cpu
CPU states: 0.0% idle, 78.2% user, 21.8% kernel, 0.0% iowait, 0.0% swap
Memory: 16G real, 7535M free, 5842M swap in use, 9965M swap free
PID USERNAME THR PRI NICE SIZE RES STATE TIME CPU COMMAND
6928 oracle 11 20 0 0K 0K run 2:20 12.62% oracle
23518 oracle 21 31 0 0K 0K run 24:37 11.69% oracle
9664 oracle 20 30 0 0K 0K run 12:41 10.83% oracle
15764 oracle 12 21 0 0K 0K run 2:18 10.28% oracle
9214 oracle 19 21 0 0K 0K run 5:52 8.58% oracle
13734 oracle 173 21 0 0K 0K cpu/3 311:23 6.11% oracle
19271 oracle 1 59 0 0K 0K cpu/0 726:20 4.45% oracle
10436 oracle 1 59 0 0K 0K sleep 81:41 4.39% oracle
22400 oracle 11 59 0 0K 0K sleep 3:22 4.35% oracle
9297 oracle 20 59 0 0K 0K cpu/2 7:39 3.66% oracle
22175 oracle 19 59 0 0K 0K sleep 6:55 3.41% oracle
9494 oracle 1 30 0 0K 0K run 0:02 2.99% oracle
10719 oracle 1 59 0 0K 0K sleep 132:48 1.55% oracle
210 oracle 1 59 0 0K 0K sleep 86:56 1.04% oracle
22084 oracle 24 59 0 0K 0K sleep 2:50 0.92% oracle
and sometime load average goes to 25-30 and cpu states is 0% idle in that load so how i can tune my database:
Regards
Prakash

Hi,
here 0% idle, 0% iowait
one of the query explain plan i am posting over here:
Operation     Object Name     Rows     Bytes     Cost     TQ     In/Out     PStart     PStop
SELECT STATEMENT Hint=CHOOSE          77 K          11800
COUNT STOPKEY
VIEW          77 K     32 M     11800
SORT UNIQUE STOPKEY          77 K     10 M     8384
HASH JOIN OUTER          77 K     10 M     4968
HASH JOIN          77 K     9 M     4477
HASH JOIN          54 K     2 M     3071
TABLE ACCESS FULL     GA_INSTANCE     10      140      1
HASH JOIN          75 K     2 M     3069
HASH JOIN          75 K     1 M     2351
INDEX FAST FULL SCAN     CUST_ACCT_ADDR_PK     75 K     960 K     282
TABLE ACCESS FULL     ADDRESS     199 K     1 M     1960
TABLE ACCESS FULL     CUST_ACCT     112 K     1 M     593
TABLE ACCESS FULL     IQARA_CNR_ACT_LOG     89 K     6 M     1150
TABLE ACCESS FULL     NI_STATIC_IP_ADDR     21 K     317 K     60
Reagrds
Prakash

How to install TOP command

Can anyone guide me how to install TOP command in solaris 10, 64bit OS?
thanks

top is not a native Solaris command but the Solaris 10 3.5.1 top package is available for SPARC & X86 on:
http://sunfreeware.com/
It may also be on one of your numerous Solaris 10 CD's. Which one? I haven't a clue.

Does "top" command work in Solaris?

Does "top" command work in solaris?
# uname -a
SunOS rac1 5.10 Generic_120012-14 i86pc i386 i86pc
# top
top: not found
Edited by: user11936985 on Aug 29, 2011 8:44 AM

Top has two sections, the summary information at the top of the screen which gives load averages, process counts, etc. and a bottom section which lists the "top processes". The prstat command standard report is similar to the bottom section of top. So if that is what you need, then prstat is an adequate substitute. It doesn't report the information in top's summary section. On the other hand, prstat is actually a much more powerful tool than top, especially is you use some of the other options. For example, "prstat -a" gives you the "top process" report plus a summary report of usage by user. If you use "prstat -J" you get a top process report with a summary by project and "prstat -Z" gives a top process report with a summary by zone. You can use options like -v or -m to get more information on each process in the "top process" section. There are other options mentioned in the manual page.
Top works and works well on Solaris. You can get a copy form sunfreeware and probably other sources as well. It doesn't come from Oracle with Solaris 10 (but does come with Solaris 11). If you're a Linux shop you might want it because it is familiar. However, you may want to look at prstat as well because it can provide some useful information that top does not.

How to find memory taken by a process using top command

I wanted to know how to find the memory taken by a process using top command. The output of the top command is as follows as an example:
Mem: 13333364k total, 13238904k used, 94460k free, 623640k buffers
Swap: 25165816k total, 112k used, 25165704k free, 4572904k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
16514 applmgr 25 0 2197m 1.7g 10m S 0.3 13.0 15:20.67 java
30692 crestelo 22 0 2901m 1.4g 9284 S 0.0 11.0 3:03.68 java
30431 crestelo 25 0 2043m 1.4g 161m S 50.9 11.0 79:02.73 java
30869 crestelo 25 0 2860m 1.2g 9292 S 0.0 9.6 7:11.18 java
16655 applmgr 23 0 1934m 1.1g 10m S 0.3 8.9 2:17.49 java
16319 crestelo 19 0 1541m 299m 44m S 0.0 2.3 2:52.11 java
I hope, my question is clear as to how to find the memory taken by a process using top command.
Please revert with the reply to my query.
Regards

Have you tried "man top" to see the documentation for the top command?
How about the following: http://lmgtfy.com/?q=show+memory+with+top+command
The 5th column (VIRT) shows the amount of RAM + swap
The 6th column (RES) shows RAM
The 7th column (SHR) shows memory shared between processes

How to find memory taken by Oracle processes using top command

I wanted to know how to find the memory taken by Oracle processes using top command. The output of the top command is as follows as an example:
Mem: 16436072k total, 16215708k used, 220364k free, 395128k buffers
Swap: 25165816k total, 1168288k used, 23997528k free, 13366520k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
27281 oraprod 15 0 6705m 1.3g 1.3g S 0.0 8.6 61:44.71 oracle
27383 oraprod 15 0 6702m 1.2g 1.2g S 0.0 7.7 2:22.75 oracle
5199 oraprod 16 0 6745m 1.1g 1.0g S 0.0 6.8 2:51.23 oracle
The different Oracle processes could be Oracle database, Oracle listener, Oracle enterprise manager etc.
I hope, my question is clear as to how to find the memory taken by a process using top command.
Please revert with the reply to my query.
Regards

a short and correct answer would be: you can't.
As oracle uses a fair amount of shared memory, and that shared memory is attached to most of the oracle processes, the same memory appears a number of times.
you should rephrase your question / what is it you want to achieve?
you can ask oracle how much memory is assigned to it, v$sga, v$sgastat, v$process (for PGA). moreover, you as DBA are the one who configured that.
you can look at major an minor faults per process to see what is causing the paging (if you have any).
you can also look at the /proc/pid/statm pseudofilesystem for your oracle pids.

Output of "top" command

i can't understand the CPU usage in top command. even the man page does not describe the necessary options. here is what i have from the "top":
Cpu(s): 3.7%us, 1.0%sy, 0.0%ni, 95.3%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st
how will i know which option represents the CPU in use and which represents free CPU ? (i mean the meanings of us, wa, id and sy )
also, what is the difference between VIRT, RES and SHR memories. which one represents RAM ?

us is processor time used by userspace processes, sy by kernel, ni by niced processes, id means idle, wa denotes waiting for I/O, hi and si are hard/soft interrupts.
Read "man top" for VIRT etc. descriptions.

Top command in oracle

hi! i want to know about the top command used in oracle , Please if some body can send relevant information then i will be highly obliged

Past few days I am getting crazy by reading question on this form. Someone recently asked that, apart from dedicated and shared mode, there is another type of mode database available in oracle. It really drives me crazy and now, someone ask TOP.
Whoever asking question, should be more clear about his doubt. They simple ask short question and expect optimal answer. And the topic prolongs by asking what is your OS, what is your oracle version, when you are getting this error and etct. stuff.
The one who is asking question, he should first be clear in his doubts, and search or google for an answer and still he has doubt, he can express all his doubts. In this way, one can learn manything.
Jaffar

Executing the top command through Java in linux

I am trying to execute the top command in Java as
Runtime.getRuntime().exec("top -n 1 >a.log");
But the command is not working in linux only through java.When i run the same command through the prompt it is working fine.Also all other commands are working fine.Is there any issue with top in linux?

flounder wrote:
Try reading [this article|http://www.javaworld.com/javaworld/jw-12-2000/jw-1229-traps.html]. If it does not answer your problem then try seaching for other similar articles.
The cited article does provide an answer to the problem since it explains how the shell meta character '>' must be interpretted by a shell. The code as presented does not invoke a shell.

What does %cpu mean in top command

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
3166 apache 15 0 29444 6112 1524 S 6.6 2.4 0:00.79 httpdPID – process ID of the process
in this above command my database showing %cpu% 90% for an oracle process.Please anyone can explain me what does it mean and is it critical

Hi;
As Aman mention, make some googling my friend. Your answer there ;)
From googling:
top command explained << video
www.metacafe.com/watch/6896501/linux_top_command_explained/
Tutorial:
http://www.linux-masters.com/2009/09/top-command-explained.html
http://linux.about.com/od/commands/l/blcmdl1_top.htm
http://www.tech-faq.com/how-to-use-the-unix-top-command.html
Regard
Helios

Clarification on the SHOW TOP command

Does anyone know much about the Show Top command? I am trying to get specs on the bandwidth utilization of a port. When
I do the Top command it tells me a percent of utilization. However it looks to be too low. I verified the util using a traffic generator test set and it has results of almost double the util. that the Top command stated. So my thoughts are that if the port is set for 100/Full then the Top stats for Util show only half Dux. Is this so??? I think that I need to double the Top results for util and that will be the true Util for the port. Can anyone verify this????

you are kind of correct, that it will look like a half duplex utilization because process actually bundles the TX AND rx into the same counter and it also looks at the full duplex bandwidth when calculating the % utilization. So a GE port is really 2000Mbps full-duplex. so, from the traffic generator you are sending at line rate of 1 Gig, the TOP will see that as 50% utilization. Does that make sense. This is how I understand it.

TOP COMMAND FOR MEMORY AVALABILITY

Hi
My database is 10g.
BANNER
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bi
PL/SQL Release 10.2.0.4.0 - Production
CORE 10.2.0.4.0 Production
TNS for Solaris: Version 10.2.0.4.0 - Production
NLSRTL Version 10.2.0.4.0 - Production
I want to check the resource availability i got the info from top command
Memory: 128G real, 6595M free, 67G swap in use, 275G swap free
PID USERNAME LWP PRI NICE SIZE RES STATE TIME CPU COMMAND
20745 oracle 2 44 0 0K 0K sleep 70:21 0.65% oracle
25404 oracle 1 55 0 0K 0K sleep 2:30 0.60% oracle
12551 oracle 2 59 0 0K 0K sleep 10:31 0.33% oracle
16841 odiuser 1 59 0 11M 3408K cpu/51 0:02 0.06% top
22475 oracle 1 53 2 0K 0K sleep 18:12 0.03% oracle
13007 oracle 2 59 0 0K 0K sleep 12:30 0.03% oracle
14879 oracle 2 59 0 0K 0K sleep 2:38 0.02% oracle
13035 oracle 1 59 0 0K 0K sleep 6:46 0.02% oracle
22471 oracle 2 53 2 0K 0K sleep 16:28 0.02% oracle
13029 oracle 2 59 0 0K 0K sleep 5:30 0.02% oracle
13000 oracle 1 59 0 0K 0K sleep 3:47 0.02% oracle
2770 oracle 27 29 10 259M 162M sleep 2:09 0.01% java
28056 odiuser 26 47 4 333M 189M sleep 286:00 0.01% java
11218 oracle 2 54 0 0K 0K sleep 4:22 0.01% oracle
17757 oracle 1 59 0 0K 0K sleep 0:00 0.01% oracle
how to analyze the with above inforamtion whether it has enough memory or not.
load averages: 0.79, 1.12, 1.33 06:25:09
181 processes: 180 sleeping, 1 on cpu
CPU states: 97.7% idle, 1.6% user, 0.7% kernel, 0.0% iowait, 0.0% swap
can anyone analyze help me to analyze the following
load averages
processes
cpu states
Please advice.

Your system was sitting idle for 97.7%
NO swaaping is gioin on, for more info you can corsscheck the same with VMSTAT,IOSTAT
for more info about top command utility
http://linux.about.com/od/commands/l/blcmdl1top.htm_

Top command

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