Permanent Generation (which is “Perm” in PermSize)
The permanent generation is used to hold reflective of the VM itself such as class objects and method objects. These reflective objects are allocated directly into the permanent generation, and it is sized independently from the other generations. Generally, sizing of this generation can be ignored because the default size is adequate. However, programs that load many classes may need a larger permanent generation.
PermSize is additional separate heap space to the -Xmx value set by the user. The section of the heap reserved for the permanent generation holds all of the reflective data for the JVM. You should adjust the size accordingly if your application dynamically load and unload a lot of classes in order to optimize the performance.
By default, MaxPermSize will be 32mb for -client and 64mb for -server. However, if you do not set both PermSize and MaxPermSize, the overall heap will not increase unless it is needed. When you set both PermSize and MaxPermSize, for example, 192mb, the extra heap space will get allocated when it startup and will stay allocated.
Source : http://www.dbuggr.com/smallwei/permsize-maxpermsize-work-java/
Sep 27, 2010
Oracle DB 11g Uninstallation.
In order to uninstall Oracle Database 11g go to "deinstall" directory in $ORACLE_HOME:
Source: http://www.emarcel.com/emarcel/database/114-uninstalldb11g
echo $ORCALE_HOME
/u01/app/oracle/product/11.2.0
cd $ORACLE_HOME/dbhome_1/deinstall
#run deinstall script (none a graphical):
sh deinstall
Source: http://www.emarcel.com/emarcel/database/114-uninstalldb11g
Sep 22, 2010
ADF Faces - Relationship Between Scopes and Page Flow
Source : http://download.oracle.com/docs/cd/E15523_01/web.1111/b31973/af_lifecycle.htm#CHDGGGBI
Important News Related to Sun Certification
New Certification Titles (Effective September 1, 2010)
Use the following table to see how the Sun Certification titles have been rebranded under the Oracle Certification program.
Source : http://education.oracle.com/pls/web_prod-plq-dad/db_pages.getpage?page_id=433&p_org_id=1080544&lang=US
Sep 16, 2010
Block/Enable usage of USB Removable Disks
Block usage of USB Removable Disks
To block your computer's ability to use USB Removable Disks follow these steps:
- Open Registry Editor.
- In Registry Editor, navigate to the following registry key:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\USBSTOR
- Locate the following value (DWORD):
Start and give it a value of 4.
Note: As always, before making changes to your registry you should always make sure you have a valid backup. In cases where you're supposed to delete or modify keys or values from the registry it is possible to first export that key or value(s) to a .REG file before performing the changes.
- Close Registry Editor. You do not need to reboot the computer for changes to apply.
Enable usage of USB Removable Disks
To return to the default configuration and enable your computer's ability to use USB Removable Disks follow these steps:
- Go to the registry path found above.
- Locate the following value:
Aug 13, 2010
Solaris Command Reference
HD info(vendor, RPM, capacity)
oasis:/home/tse/dxy[9:18pm] iostat -E
sd0 Soft Errors: 0 Hard Errors: 3 Transport Errors: 0
Vendor: SEAGATE Product: ST34371W SUN4.2G Revision: 7462 Serial No: 9742K71685
RPM: 7200 Heads: 16 Size: 4.29GB <4292075520>
Media Error: 0 Device Not Ready: 0 No Device: 3 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
sd1 Soft Errors: 0 Hard Errors: 3 Transport Errors: 0
Vendor: SEAGATE Product: ST32171W SUN2.1G Revision: 7462 Serial No: 9736T74649
RPM: 5400 Heads: 19 Size: 2.13GB <2127708160>
Media Error: 0 Device Not Ready: 0 No Device: 3 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
sd6 Soft Errors: 0 Hard Errors: 3 Transport Errors: 0
Vendor: TOSHIBA Product: XM5701TASUN12XCD Revision: 0997 Serial No: 04/09/97
RPM: 0 Heads: 0 Size: 18446744073.71GB <-8589934591 bytes>
Media Error: 0 Device Not Ready: 3 No Device: 0 Recoverable: 0
Illegal Request: 0 Predictive Failure Analysis: 0
Display the number of used and free i-nodes
impulse:/home/dxy[4:07pm] df -F ufs -o i
Filesystem iused ifree %iused Mounted on
/dev/dsk/c0t3d0s0 38555 403045 9% /
/dev/dsk/c0t1d0s0 160761 345607 32% /export/home
/dev/md/dsk/d20 149826 1905214 7% /usr/local
impulse:/home/dxy[4:07pm] /usr/ucb/df -i
Filesystem iused ifree %iused Mounted on
/dev/dsk/c0t3d0s0 38555 403045 9% /
/dev/dsk/c0t1d0s0 160761 345607 32% /export/home
/dev/md/dsk/d20 149826 1905214 7% /usr/local
impulse:/home/dxy[4:07pm]
Display processes with the highest CPU utilization
velocity:/home/dxy[4:54pm] ps -eo pid,pcpu,args | sort +1n
Display processes with the highest memory usage
velocity:/home/dxy[4:54pm] ps -eo pid,vsz,args | sort +1n
Printing disk geometry and partition info
oasis:/home/dxy[4:16pm] prtvtoc /dev/rdsk/c0t0d0s0
* /dev/rdsk/c0t0d0s0 partition map
*
* Dimensions:
* 512 bytes/sector
* 135 sectors/track
* 16 tracks/cylinder
* 2160 sectors/cylinder
* 3882 cylinders
* 3880 accessible cylinders
*
* Flags:
* 1: unmountable
* 10: read-only
*
* First Sector Last
* Partition Tag Flags Sector Count Sector Mount Directory
0 2 00 0 7855920 7855919 /usr/local
1 3 01 7855920 524880 8380799
2 5 00 0 8380800 8380799
oasis:/home/dxy[4:16pm]
Checking whether it's running in 32-bit mode or 64-bit mode
64-bit mode
% isalist -v
sparcv9+vis sparcv9 sparcv8plus+vis sparcv8plus sparcv8 sparcv8-fsmuld sparcv7 sparc
% isainfo -v
64-bit sparcv9 applications
32-bit sparc applications
32-bit mode
% isalist -v
sparcv8plus+vis sparcv8plus sparcv8 sparcv8-fsmuld sparcv7 sparc
% isainfo -v
32-bit sparc applications
Verifying a route to a specified network
# route -n get xxx.yyy.zzz.0
route to: xxx.yyy.zzz.0
destination: default
mask: default
gateway: xxx.yyy.aaa.254
interface: hme0
flags:
recvpipe sendpipe ssthresh rtt,msec rttvar hopcount mtu expire
0 0 0 0 0 0 1500 0
#
print the version of OBP
% prtconf -V
OBP 3.3.2 1996/06/28 08:43
% /usr/platform/`uname -i`/sbin/prtdiag -v | grep OBP
OBP 3.11.1 1997/12/03 15:53 POST 3.11.4 1997/05/27 02:26
%
{2} ok .version
Release 3.23 Version 1 created 1999/07/16 12:08
OBP 3.23.1 1999/07/16 12:08
POST 2.0.2 1998/10/19 10:46
{2} ok
print the version of Open Windows
% showrev -w
OpenWindows version:
OpenWindows Version 3.6.1 25 January 1999
%
To determine which monitor resolution is available
% /usr/sbin/ffbconfig -res \?
Valid values for -res option are:
1024x768x60 [1]
1024x768x70 [1]
1024x768x75 [1] [2]
1024x768x77
1024x800x84
1152x900x66
1152x900x76
1280x800x76 [1] [2]
1280x1024x60 [1] [2]
1280x1024x67
1280x1024x76
1280x1024x85 [1] [2]
960x680x112s
960x680x108s
640x480x60 [1] [2]
640x480x60i [1]
768x575x50i [1]
1440x900x76 [1] [2]
1600x1000x66 [1] [2]
1600x1000x76 [1] [2]
1600x1280x76 [1] [2]
1920x1080x72 [1] [2]
1920x1080x76 [1] [2]
1920x1200x70 [1] [2]
1920x1200x75 [1] [2]
svga [1]
1152
1280
stereo
vga [1] [2]
ntsc [1]
pal [1]
none
Notes:
[1] monitor does not support this resolution.
[2] this version of FFB (FFB1) does not support this resolution.
%
system configuration
% sysdefDisplay the device list (and drivers attached to devices)
% prtconf -D
System Configuration: Sun Microsystems sun4u
Memory size: 256 Megabytes
System Peripherals (Software Nodes):
SUNW,Ultra-1
packages
terminal-emulator
deblocker
obp-tftp
disk-label
ufs-file-system
chosen
openprom
client-services
options, instance #0 (driver name: options)
aliases
memory
virtual-memory
counter-timer
sbus, instance #0 (driver name: sbus)
SUNW,CS4231 (driver name: audiocs)
auxio
flashprom
SUNW,fdtwo, instance #0 (driver name: fd)
eeprom (driver name: eeprom)
zs, instance #0 (driver name: zs)
zs, instance #1 (driver name: zs)
sc
SUNW,pll
SUNW,fas, instance #0 (driver name: fas)
sd (driver name: sd)
st (driver name: st)
sd, instance #0 (driver name: sd)
sd, instance #1 (driver name: sd)
sd, instance #2 (driver name: sd)
sd, instance #3 (driver name: sd)
sd, instance #4 (driver name: sd)
sd, instance #5 (driver name: sd)
sd, instance #6 (driver name: sd)
sd, instance #7 (driver name: sd)
sd, instance #8 (driver name: sd)
sd, instance #9 (driver name: sd)
sd, instance #10 (driver name: sd)
sd, instance #11 (driver name: sd)
sd, instance #12 (driver name: sd)
sd, instance #13 (driver name: sd)
sd, instance #14 (driver name: sd)
SUNW,hme, instance #0 (driver name: hme)
SUNW,bpp (driver name: bpp)
SUNW,UltraSPARC
SUNW,ffb, instance #0 (driver name: ffb)
pseudo, instance #0 (driver name: pseudo)
processor type, speed
% psrinfo -v
Status of processor 0 as of: 06/16/99 12:38:51
Processor has been on-line since 02/07/99 01:47:11.
The sparcv9 processor operates at 200 MHz,
and has a sparcv9 floating point processor.
patch applied on the system
% showrev -pexported file system on NFS server
% showmount -e NFS_SERVERdisplay current run level
% who -rFind out a package which a file belongs to
% pkgchk -l -p /usr/lib/sendmail
Pathname: /usr/lib/sendmail
Type: regular file
Expected mode: 4555
Expected owner: root
Expected group: bin
Expected file size (bytes): 650720
Expected sum(1) of contents: 22626
Expected last modification: Apr 07 04:13:53 1999
Referenced by the following packages:
SUNWsndmu
Current status: installed
%
Examining gcc behavior
% gcc -v -x c /dev/nullDisplay the version of CDE
% /usr/ccs/bin/what /usr/dt/bin/dtmail
/usr/dt/bin/dtmail:
CDE Version 1.3.4
CDEVersion1.3.4
Display the version of BIND
% nslookup -class=chaos -q=txt version.bind ns0.optix.org
Server: impulse.optix.org
Address: 210.164.85.210
Aliases: 210.85.164.210.in-addr.arpa
VERSION.BIND text = "8.2.2-P5"
% dig @ns-tk021.ocn.ad.jp version.bind chaos txt
; <<>> DiG 8.2 <<>> @ns-tk021.ocn.ad.jp version.bind chaos txt
; (1 server found)
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 6
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUERY SECTION:
;; version.bind, type = TXT, class = CHAOS
;; ANSWER SECTION:
VERSION.BIND. 0S CHAOS TXT "4.9.7-REL"
;; Total query time: 81 msec
;; FROM: velocity to SERVER: ns-tk021.ocn.ad.jp 203.139.160.103
;; WHEN: Tue May 9 17:26:23 2000
;; MSG SIZE sent: 30 rcvd: 64
%
system configuration
% /usr/platform/`uname -i`/sbin/prtdiag
System Configuration: Sun Microsystems sun4u 8-slot Sun Enterprise 4000/5000
System clock frequency: 82 MHz
Memory size: 512Mb
========================= CPUs =========================
Run Ecache CPU CPU
Brd CPU Module MHz MB Impl. Mask
--- --- ------- ----- ------ ------ ----
0 0 0 248 2.0 US-II 1.1
0 1 1 248 2.0 US-II 1.1
2 4 0 248 2.0 US-II 1.1
2 5 1 248 2.0 US-II 1.1
========================= Memory =========================
Intrlv. Intrlv.
Brd Bank MB Status Condition Speed Factor With
--- ----- ---- ------- ---------- ----- ------- -------
0 0 256 Active OK 60ns 2-way A
2 0 256 Active OK 60ns 2-way A
========================= IO Cards =========================
Bus Freq
Brd Type MHz Slot Name Model
--- ---- ---- ---- -------------------------------- ----------------------
1 SBus 25 3 SUNW,hme
1 SBus 25 3 SUNW,fas/sd (block)
1 SBus 25 13 SUNW,soc/SUNW,pln 501-2069
5 SBus 25 3 SUNW,hme
5 SBus 25 3 SUNW,fas/sd (block)
5 SBus 25 13 SUNW,soc/SUNW,pln 501-2069
Detached Boards
===============
Slot State Type Info
---- --------- ------ -----------------------------------------
3 disabled disk Disk 0: Target: 10 Disk 1: Target: 11
7 disabled disk Disk 0: Target: 14 Disk 1: Target: 15
No failures found in System
===========================
No System Faults found
======================
Jul 30, 2010
Pen-drive format in Linux
Steps to format pen-drive in Linux
- Insert your USB. Let it get detected and mounted automatically.
- Run sudo umount /dev/sda (substitute sda with your device)
- Run sudo mkfs.vfat -n 'PEN_DRIVE_LABEL' -I /dev/sda
- Remove and insert the pen drive to mount.
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