In synch_io mode is db_writer_processes=cpus ok or do I need dbrw_io_slaves
Using 11.2.0.3.0 on sun unix sprac server, 8 cpus. Due to OS bug we can not run in asynch i/o mode (we set disk_asynch_io = false). Our next window for OS fix is June.
in meantime DBA says that setting db_writer_processes = # of cpus(8) is all we need. i mentioned that docs say that dbrw_io_slaves should be set to > 0 but he says that that setting is depreciated and not needed that db_writer_processes is all we need. In fact he says that he doesn't think that going back to async i/o is going to make much difference. now management is thinking if it aint broke why fix it, why risk OS upgrade if things aren't broken. I brought that on our db log file synchs are 100 to 1 to db sequential and scattered reads and that that is not good, and that we are about to hit our busiest time.
So is db_writer_processes setting all we need to deal with running in synch I/O mode or will setting dbrw_io_slaves be a plus. Unfortunately we do hav a window to test different settings and their impact on performance. I respect the people here and so do my bosses.
Hi,
Could you please use the code tags to format your code? Read about how to do that in the [url https://forums.oracle.com/forums/help.jspa]FAQs. It makes it a lot easier for everyone and you will get more responses.
You mean the top 5 sessions over the last 3 days for the log file sync wait event? I assume you've said 3 days because you are looking at the v$system_event view which is cumulative since startup? Please confirm.
The response times look pretty bad for the log file sync event - I'm looking at the average_wait time there, which is in milliseconds. On my system, for example, we have 1ms response time and we generate 5MB of REDO a second. Obviously there are many factors to consider but you wnat to get it as low as possible.
How does the load on the disks look? Do you have your REDO logs on the same drives as your data files?
Feel free for someone else to correct me if you think I'm wrong on this but my thoughts are that you have two issues.
1) Async vs sync for I/O. I would say async is better but you'd have to test it for your application and load profile
2) High log file sync wait event, which is synchronous because of what I mentioned earlier so I don't rhink running in async mode would help here
Do you have an AWR report you can paste out here (using the code tags)? Not the whole thing, just the key parts at the top of the report.
Rob
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The newer problem is concerned with installing the XP Virtual Machine on Win7x64 with greater than four cores in the cpu architecture. Others have mentioned this problem over this past Summer 2012. The problem is that at the very last step of
the complete install, Win7x64 reports a failure to install the XP Virtual Machine, and with no further comment.
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this Summer 2012.
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not install, as described above.
I have an armload of new 64-bit software all of which has installed pristinely in Win7x64 under this 2xE5-2620 Intel architecture. However, I have one very important piece of legacy (latest version incompatible beyond XP type of legacy) technical writing
software that is critical to my PhD thesis. In need the XP Virtual Machine for this, and I have no idea how to get it. My PhD thesis supervisor also needs this particular piece of "legacy" technical writing software for his new book on Probability
Theory.
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machine with Windows 7, but without XP Mode, and there is a reason why.
As an aside, it should be mentioned that the main line MSFT OS, Windows 7 or 8, is what I want for this machine, and not Server 2012. The reason is that most of the scientific computation and technical writing software that I use is written only for
Windows, and not for Server. Then also hopefully Hyper-V can do in Windows 8 most of what XP Mode is doing for me in Windows 7.
My dealer was able to tell me, when he got back from holidays in late September, that the reason that XP Mode failed to install on this Workstation, and the reason it was not included by the OEM, was that the original HDD configuration was for RAID (3 available
bays) and formatted for drives of at least 1TB in size. Although the original HDD installation was only a single HDD with only 500GB, the machine was equipped to have something much larger installed. But this format excluded the possibility of
XP Mode.
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we could use the MBR format which allows XP mode. Then we also formatted the original HDD of 500GB in MBR, and decided to run it with Intel RST. This second drive is for unimportant data, and large files. For backup we chose a 2TB USB 3.0
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1011::1000
1011::1000 -
Not able to get Shared Server Mode to work in XE
The server is an HP Dual CPU Xeon, 4 GB RAM. 120GB HD.
Oracle XE reports the following:
SGA 768 Target, 768MB Current.
PGA 256MB Target, 55MB current (when there are a small number of client connections)
The application and database work properly with a small number of connections, but
memory usage goes way up on PGA when I start to add more connections.
I have tried to set up the Oracle server in "Shared Server Mode" , but it appears
that I was unsuccessful.
From what I can tell, the oracle listener does not seem to be fowarding the incoming requests to the shared server dispatchers, but
instead it is deciding to kick off a dedicated server process to handle each client request.
In other words, it is working in dedicated server mode.
I am stumped as to what needs to be done next. From what
I can tell from reading documentation this should be working.
Please advice as to what else I can do to get things working.
Here is additional information:
The parameter SHARED_SERVERS is equal to 4.
parameter dispatchers=(PROTOCOL=TCP) (SERVICE=XEXDB)
max_shared_servers, max_dispatchers, shared_server_sessions have no values.
processes=150
sessions=170
Output of lnsrctl utility:
LSNRCTL> services
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC_FOR_XE)))
Services Summary...
Service "CLRExtProc" has 1 instance(s).
Instance "CLRExtProc", status UNKNOWN, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0
LOCAL SERVER
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0
LOCAL SERVER
Service "XEXDB" has 1 instance(s).
Instance "xe", status READY, has 1 handler(s) for this service...
Handler(s):
"D000" established:0 refused:0 current:0 max:1002 state:ready
DISPATCHER <machine: CO_DB, pid: 5844>
(ADDRESS=(PROTOCOL=tcp)(HOST=myhostname)(PORT=1771)
Service "XE_XPT" has 1 instance(s).
Instance "xe", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
LOCAL SERVER
Service "xe" has 1 instance(s).
Instance "xe", status READY, has 1 handler(s) for this service...
Handler(s):
"DEDICATED" established:0 refused:0 state:ready
LOCAL SERVER
The command completed successfully
ILSNRCTL> status
Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC_FOR_XE)))
STATUS of the LISTENER
Alias LISTENER
Version TNSLSNR for 32-bit Windows: Version 10.2.0.1.0 - Produ
ction
Start Date 18-SEP-2007 16:06:55
Uptime 0 days 0 hr. 1 min. 33 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Default Service XE
Listener Parameter File E:\oraclexe\app\oracle\product\10.2.0\server\network\a
dmin\listener.ora
Listener Log File E:\oraclexe\app\oracle\product\10.2.0\server\network\l
og\listener.log
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=\\.\pipe\EXTPROC_FOR_XEipc)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=myhostname)(PORT
=1521)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=127.0.0.1)(PORT=8080))(Presentation=
HTTP)(Session=RAW))
Services Summary...
Service "CLRExtProc" has 1 instance(s).
Instance "CLRExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "PLSExtProc" has 1 instance(s).
Instance "PLSExtProc", status UNKNOWN, has 1 handler(s) for this service...
Service "XEXDB" has 1 instance(s).
Instance "xe", status READY, has 1 handler(s) for this service...
Service "XE_XPT" has 1 instance(s).
Instance "xe", status READY, has 1 handler(s) for this service...
Service "xe" has 1 instance(s).
Instance "xe", status READY, has 1 handler(s) for this service...
The command completed successfully
The contents of the spfile2init.ora file:
xe.__db_cache_size=104857600
xe.__java_pool_size=4194304
xe.__large_pool_size=469762048
xe.__shared_pool_size=222298112
xe.__streams_pool_size=0
*.audit_file_dest='E:\oraclexe\app\oracle\admin\XE\adump'
*.background_dump_dest='E:\oraclexe\app\oracle\admin\XE\bdump'
*.compatible='10.2.0.1.0'
*.control_files='E:\oraclexe\oradata\XE\control.dbf'
*.core_dump_dest='E:\oraclexe\app\oracle\admin\XE\cdump'
*.db_name='XE'
*.db_recovery_file_dest='f:\oracle_flash_recovery_area'
*.db_recovery_file_dest_size=42949672960
*.dispatchers='(PROTOCOL=TCP) (SERVICE=XEXDB)'
*.job_queue_processes=4
*.open_cursors=300
*.os_authent_prefix=''
*.pga_aggregate_target=268435456
*.processes=150
*.remote_login_passwordfile='EXCLUSIVE'
*.sessions=20
*.sga_target=805306368
*.shared_servers=4
*.undo_management='AUTO'
*.undo_tablespace='UNDO'
*.user_dump_dest='E:\oraclexe\app\oracle\admin\XE\udump'
The contents of listener.ora:
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = E:\oraclexe\app\oracle\product\10.2.0\server)
(PROGRAM = extproc)
(SID_DESC =
(SID_NAME = CLRExtProc)
(ORACLE_HOME = E:\oraclexe\app\oracle\product\10.2.0\server)
(PROGRAM = extproc)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
(ADDRESS = (PROTOCOL = TCP)(HOST = myhostname)(PORT = 1521))
DEFAULT_SERVICE_LISTENER = (XE)
The contents of tnsnames.ora
XE =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = myhostname)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = XE)
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
ORACLR_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
(CONNECT_DATA =
(SID = CLRExtProc)
(PRESENTATION = RO)
The contents of sqlnet.ora:
# This file is actually generated by netca. But if customers choose to
# install "Software Only", this file wont exist and without the native
# authentication, they will not be able to connect to the database on NT.
SQLNET.AUTHENTICATION_SERVICES = (NTS)I don't think it is supported because of XE multiple cpu usage limitations but "shared server" is not documented in the XE documentation - http://www.oracle.com/pls/xe102/ranked?word=%22shared+server%22
so you may want to follow this guide for setup and try -
http://download.oracle.com/docs/cd/B19306_01/server.102/b14231/manproc.htm#ADMIN00502
Best Regards,
H.Tonguç YILMAZ
My Oracle blog
http://tonguc.wordpress.com
"Never believe all you read or hear! Just because it is printed or someone is more experienced doesn't mean it is TRUE.." -
Problem with JTree in expanded mode?
Hi I have a JTree and I have added few nodes to it. Now when i run my program it is displaying all the nodes in the expanded mode. but at some point of time i need to add few more nodes. when i am am adding nodes to the root node when the tree in expanded mode the newly added nodes are not visible. They are not getting added. what could be the problem? how do i add nodes to the tree when in expanded mode as well as remove few nodes when in expanded mode?
My code is as follows.
import java.awt.BorderLayout;
import javax.swing.JDesktopPane;
import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTree;
import javax.swing.tree.DefaultMutableTreeNode;
public class Main extends JFrame{
private DefaultMutableTreeNode top;
public JTree mainTree;
public Main(){
super();
JDesktopPane dp=new JDesktopPane();
dp.setLayout(new BorderLayout());
top =new DefaultMutableTreeNode("All Active Nodes");
mainTree=new JTree(top);
JScrollPane mtsp=new JScrollPane(mainTree);
dp.add(mtsp,BorderLayout.CENTER);
this.setContentPane(dp);
this.setDefaultCloseOperation(DISPOSE_ON_CLOSE);
this.setSize(300, 550);
this.setVisible(true);
public static void main(String[]args)throws Exception{
Main as=new Main();
DefaultMutableTreeNode top=as.getTop();
DefaultMutableTreeNode node=new DefaultMutableTreeNode("murali");
top.add(node);
as.mainTree.expandRow(0);
Thread.sleep(10000);
System.out.println("there");
DefaultMutableTreeNode node1=new DefaultMutableTreeNode("murali12");
top.add(node1);
* @return the top
public DefaultMutableTreeNode getTop() {
return top;
}I got the solution. The solution is to invoke nodesWereInserted(TreeNode node, int[] childIndices) this on treeModel after adding nodes are removing nodes.
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How to start my mac book pro safe mode?
my mac book pro is not start up but showing white screen . what should i do ?
Take each of these steps that you haven't already tried. Stop when the problem is resolved.
Step 1
The first step in dealing with a startup failure is to secure the data. If you want to preserve the contents of the startup drive, and you don't already have at least one current backup, you must try to back up now, before you do anything else. It may or may not be possible. If you don't care about the data that has changed since the last backup, you can skip this step.
There are several ways to back up a Mac that is unable to start. You need an external hard drive to hold the backup data.
a. Start up from the Recovery partition, or from a local Time Machine backup volume (option key at startup.) When the OS X Utilities screen appears, launch Disk Utility and follow the instructions in this support article, under “Instructions for backing up to an external hard disk via Disk Utility.” The article refers to starting up from a DVD, but the procedure in Recovery mode is the same. You don't need a DVD if you're running OS X 10.7 or later.
b. If Step 1a fails because of disk errors, and no other Mac is available, then you may be able to salvage some of your files by copying them in the Finder. If you already have an external drive with OS X installed, start up from it. Otherwise, if you have Internet access, follow the instructions on this page to prepare the external drive and install OS X on it. You'll use the Recovery installer, rather than downloading it from the App Store.
c. If you have access to a working Mac, and both it and the non-working Mac have FireWire or Thunderbolt ports, start the non-working Mac in target disk mode. Use the working Mac to copy the data to another drive. This technique won't work with USB, Ethernet, Wi-Fi, or Bluetooth.
d. If the internal drive of the non-working Mac is user-replaceable, remove it and mount it in an external enclosure or drive dock. Use another Mac to copy the data.
Step 2
If the startup process stops at a blank gray screen with no Apple logo or spinning "daisy wheel," then the startup volume may be full. If you had previously seen warnings of low disk space, this is almost certainly the case. You might be able to start up in safe mode even though you can't start up normally. Otherwise, start up from an external drive, or else use the technique in Step 1b, 1c, or 1d to mount the internal drive and delete some files. According to Apple documentation, you need at least 9 GB of available space on the startup volume (as shown in the Finder Info window) for normal operation.
Step 3
Sometimes a startup failure can be resolved by resetting the NVRAM.
Step 4
If you use a wireless keyboard, trackpad, or mouse, replace or recharge the batteries. The battery level shown in the Bluetooth menu item may not be accurate.
Step 5
If there's a built-in optical drive, a disc may be stuck in it. Follow these instructions to eject it.
Step 6
Press and hold the power button until the power shuts off. Disconnect all wired peripherals except those needed to start up, and remove all aftermarket expansion cards. Use a different keyboard and/or mouse, if those devices are wired. If you can start up now, one of the devices you disconnected, or a combination of them, is causing the problem. Finding out which one is a process of elimination.
Step 7
If you've started from an external storage device, make sure that the internal startup volume is selected in the Startup Disk pane of System Preferences.
Start up in safe mode. Note: If FileVault is enabled, or if a firmware password is set, or if the startup volume is a software RAID, you can’t do this. Post for further instructions.
Safe mode is much slower to start and run than normal, and some things won’t work at all, including wireless networking on certain Macs.
The login screen appears even if you usually log in automatically. You must know the login password in order to log in. If you’ve forgotten the password, you will need to reset it before you begin.
When you start up in safe mode, it's normal to see a dark gray progress bar on a light gray background. If the progress bar gets stuck for more than a few minutes, or if the system shuts down automatically while the progress bar is displayed, the startup volume is corrupt and the drive is probably malfunctioning. In that case, go to Step 11. If you ever have another problem with the drive, replace it immediately.
If you can start and log in in safe mode, empty the Trash, and then open the Finder Info window on the startup volume ("Macintosh HD," unless you gave it a different name.) Check that you have at least 9 GB of available space, as shown in the window. If you don't, copy as many files as necessary to another volume (not another folder on the same volume) and delete the originals. Deletion isn't complete until you empty the Trash again. Do this until the available space is more than 9 GB. Then restart as usual (i.e., not in safe mode.)
If the startup process hangs again, the problem is likely caused by a third-party system modification that you installed. Post for further instructions.
Step 8
Launch Disk Utility in Recovery mode (see Step 1.) Select the startup volume, then run Repair Disk. If any problems are found, repeat until clear. If Disk Utility reports that the volume can't be repaired, the drive has malfunctioned and should be replaced. You might choose to tolerate one such malfunction in the life of the drive. In that case, erase the volume and restore from a backup. If the same thing ever happens again, replace the drive immediately.
This is one of the rare situations in which you should also run Repair Permissions, ignoring the false warnings it may produce. Look for the line "Permissions repair complete" at the end of the output. Then restart as usual.
Step 9
If the startup device is an aftermarket SSD, it may need a firmware update and/or a forced "garbage collection." Instructions for doing this with a Crucial-branded SSD were posted here. Some of those instructions may apply to other brands of SSD, but you should check with the vendor's tech support.
Step 10
Reinstall the OS. If the Mac was upgraded from an older version of OS X, you’ll need the Apple ID and password you used to upgrade.
Step 11
Do as in Step 9, but this time erase the startup volume in Disk Utility before installing. The system should automatically restart into the Setup Assistant. Follow the prompts to transfer the data from a Time Machine or other backup.
Step 12
This step applies only to models that have a logic-board ("PRAM") battery: all Mac Pro's and some others (not current models.) Both desktop and portable Macs used to have such a battery. The logic-board battery, if there is one, is separate from the main battery of a portable. A dead logic-board battery can cause a startup failure. Typically the failure will be preceded by loss of the settings for the startup disk and system clock. See the user manual for replacement instructions. You may have to take the machine to a service provider to have the battery replaced.
Step 13
If you get this far, you're probably dealing with a hardware fault. Make a "Genius" appointment at an Apple Store, or go to another authorized service provider. -
Printing barcode in oracle report 6i in character mode
Hi there,
I am new in oracle reports, especially in printing it in character mode.
I am trying to create a report for ticketing purposes, so I have to put barcode on it.
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Your help is highly needed, any opinion will do. I just need help that bad.
Thanks..
Edited by: shynn on Jul 18, 2012 6:56 PMHi guys,
I already get the character mode using ESC character.
Just this, I need your help.. Do you know the ESC code for the barcode that we could add in .prt file?
Just the ESC code, but if there is needed for configuration for that, kindly add it up.
Thanks, -
Oracle 6i report in character mode
we have been using oracle 6i report in Windows XP, our printer is attached to the said PC when we print character mode the print out is not in character mode but if we send the print-out in a printer attached to a PC using win98 the printout is perfect.
Hi guys,
I already get the character mode using ESC character.
Just this, I need your help.. Do you know the ESC code for the barcode that we could add in .prt file?
Just the ESC code, but if there is needed for configuration for that, kindly add it up.
Thanks, -
I have a macbook pro which i presume runs in a 64 bit mode. living in a country without broadband i need to use a 32 bit modem, can i change the system to run this modem at 32 bit as it wont load at 64?
Reboot holding 3 and 2, see if your modem works.
Rebooting again sets it back to 64 bit.
If 32 bit works then your fine, for now, but eventually your going to have to go 64 bit. -
My Foscam FI8910W, opens after sign in, with three modes to choose from. Only the ActiveX mode, in IE, works to allow recordings to be made. Sometime back, just after I bought this new laptop, a free AT&T program with McAfee, is available for AT&T users. But this app, can only be loaded into Internet Explorer, and something wrong with IE, prevented it from happening. I contacted AT&T Tech support, allowed the tech onto my machine, and even he could not solve it. He then opened Firefox I already had, and installed some program, that made Firefox actually act like IE, so that McAfee software, could be downloaded and installed. It worked, using Firefox to replace IE, to download and install, but the print spooler on my pc, went bad, and would not work to use my printer. Dell tech also took control of the pc, found a complete Windows 7 reinstall was needed, and he did so. Now, the print spooler works, but the fresh install, did away with the software the AT&T Tech added to Firefox.
IE is a pain, but we need it, for some sites, like for the Activex mode, with my camera. I tried pening it in Firefox, in the ActiveX mode, and it opens, but with no picture. When I click on Device Management, to go to settings, I can't. What I get, is a small pop up balloon on lower right, that says 'javascript:administrator0'. Thinking maybe Javascript was disabled, I checked in options, and it is not, it's checked, thus enabled. I am on my pc, as administrator, so now I am stuck. Is there someone who can explain how to make it work, so I can use my camera in ActiveX mode, so I can actually record tings, if need be, when I leave? Thanks in advance. Oh, My Win 7, has the 64 bit OS, not the 32 if that helps.Thanks for that reply. I know ActiveX is only used on Internet Explorer. But as I previously stated, the AT&T Tech who helped me download McAfee, that their website only allows downloads with Internet Explorer, and for some reason, IE wasn't working right, so McAfee was not available, but the Tech got control of my pc, installed some sort of software program, onto Firefox, that gave Firefox the same options, as IE has. When that was done, I was able to download and install McAfee, using Firefox, instead of using IE. Since then, I had to reinstall my Windows 7 OS on my pc, so IE now works, but is still a bother using it to RECORD from the Foscam camera. Internet Explorer, is the ONLY BROWSER, that Foscam RECORDS ON, using the ActiveX mode. I can view things with the camera, in Chrome, Firefox, Opera and such, using another choice, the USER PUSH MODE, but that and the other choice, Mobile Phone, will ONLY let you watch or monitor what is being shown, but you CAN NOT RECORD, if it's not in ActiveX mode, using IE. I hoped, that whatever the technician used and installed on my pc, to fool the web into allowing something to be installed, by FIREFOX, and not by Internet Explorer as it was set up to do, would also allow Firefox to ACT like IE again, and allow the ActiveX mode, to work in Firefox. Really, what I am looking for, is probably a patch, that adds IE abilities and runs like IE, to maybe get the ActiveX aspect, to use in Firefox. Maybe I am asking a lot, but I know Firefox worked as if it was IE, to fool the site into allowing it to 'THINK' Firefox, was really Internet Explorer. As for asking Foscam for technical support, I did, and not only did the foreigner get access to my computer, made changes, the changes he made, I had to uninstall, and reinstall the Foscam camera. Outsourcing tech support, doesn't help me much, when it's with someone, that ENGLISH, is not their native language. If I can't understand someone speaking to me, isn't very good in trying to get help. Again, thanks for your reply.
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