ORACLE Database running slow on AIX ( nmon / topas ) Post: 302447132

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Operating Systems AIX ORACLE Database running slow on AIX ( nmon / topas ) Post 302447132 by filosophizer on Saturday 21st of August 2010 04:04:09 PM

08-21-2010

Registered User

Thanks for the reply ; zxmaus, what does vmstat -I 2 20 tell us

vmstat -I 2 20

Code:

# vmstat -I 2  2
System Configuration: lcpu=2 mem=4096MB
   kthr       memory              page               faults        cpu
-------- -----------  ------------------------ ------------ -----------
 r  b   p   avm   fre  fi  fo  pi  po   fr  sr   in   sy  cs us sy id wa
 1   2  0 802714  5120 394  34   7   8 409   101 448 3455 1338 10  3 82  5
 1  1  0 802802   4944  43   8   1   0    0    0 527 4472 1339 11  3 80  7
#

---------- Post updated at 12:04 PM ---------- Previous update was at 02:45 AM ----------

It is very confusing to decode / translate VMSTAT output. Searching on Google for VMSTAT translation I came across this link
http://www.skywayradio.com/tech/linux/vmstat.html
http://www.ibmsystemsmag.com/aix/februarymarch04/features/6670p1.aspx
http://www.tek-tips.com/viewthread.cfm?qid=1186922&page=1
http://www.aixexpert.com/wiki/index.php/AIX_Expert

From the AIX 5.1 "man" pages, the vmstat command reports statistics about kernel threads, virtual memory, disks, traps and CPU activity. These system-wide (among all processors) statistics are calculated as averages for values expressed as percentages and as sums otherwise. If the vmstat command is invoked without flags, the report contains a summary of activity since system startup. The interval parameter specifies the amount of time between each report in seconds. The first report contains statistics for the time since startup. Subsequent reports contain statistics collected during the interval since the previous report.

but now, I am more confused, can someone help me from the above output for vmstat -I 2 20 ; what does it show ?

How can I make sure that I need more memory or Need more processing power ? because someone told me, that ORACLE when it starts takes up all the available memory, so even if I have 100GB memory, it will always show little memory remaining. is this true ?

filosophizer

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LEARN ABOUT OSF1

ppmtosixel

ppmtosixel(1)						      General Commands Manual						     ppmtosixel(1)

NAME

       ppmtosixel - convert a portable pixmap into DEC sixel format

SYNOPSIS

       ppmtosixel [-raw] [-margin] [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as input.  Produces sixel commands (SIX) as output.	The output is formatted for color printing, e.g. for a DEC
       LJ250 color inkjet printer.

       If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled.  A printer control header and a color assignment table
       begin the SIX file.  Image data is written in a compressed format by default.  A printer control footer ends the image file.

OPTIONS

       -raw   If  specified,  each  pixel  will  be explicitly described in the image file.  If -raw is not specified, output will default to com-
	      pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands.  A raw file is often an order	of  magni-
	      tude larger than a compressed file and prints much slower.

       -margin
	      If  -margin  is not specified, the image will be start at the left margin (of the window, paper, or whatever).  If -margin is speci-
	      fied, a 1.5 inch left margin will offset the image.

PRINTING

       Generally, sixel files must reach the printer unfiltered.  Use the lpr -x option or cat filename > /dev/tty0?.

BUGS

       Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion.  If the original PPM maxval was
       greater	than  100,  rescaling  also reduces the image depth.  While the actual RGB values from the ppm file are more or less retained, the
       color palette of the LJ250 may not match the colors on your screen.  This seems to be a printer limitation.

SEE ALSO

       ppm(5)

AUTHOR

       Copyright (C) 1991 by Rick Vinci.

								   26 April 1991						     ppmtosixel(1)