Large Pages Issue in Oracle.

| Large-Page ------------------------------------------------------------------|
| |
|Count = 0 0 MB Size=16 MB (16777216 bytes) |
|Free = 0 0 MB |
|In Use= 0 0 MB High water mark=0 |
| |
|------------------------------------------------------------------------------|
nmon is reporting 0 Large Pages in use by Oracle - What could be the reason behind it ?

What could be the reason behind it ?none are in use
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Large pages in Windows / Oracle

Hi,
Has anyone here tried to activate large pages in Windows/Oracle environment?
ORA_LPENABLE = 1
Does SAP support this?
VMware pushes towards large pages.
BR,
Samuli Kaisanlahti

Hi,
Never tested it, but what I can confirm is that, at this moment, it is not supported in an SAP environment.
Br,
Javier

Empty page issue in Oracle Reports!

Hi All,
I am facing an empty page issue between header and cover trailer when Main section is empty.
In a report there are two forms Form-1 (Portrait size) , Form-2 (Landscape size)...
Based on run time parameter we optionally print form-1 , form-2 or both.
ie if run time parameter is 1 then only form 1
if it is 2 then only form - 2
if it is 3 then both
As Form-1 is portrait size and Form-2 is Landscape size,
At present in Report Layout, Form-1 is designed in Cover page Header Section
and Form-2 is designed in Main section of report.
So When the report is run with PRINT_PATTERN='2', Main section will be empty.
An empty page issue appears in report for form-2.
Is there anyway to avoid EMPTY PAGE issue between header and trailer page,
based on runtime parameter value if Main section is empty.
Thanks in advance.

Hi vdsk,
The issue I posted is not about the rdf or in concurrent program. The problem I've encountered is in the tally printer itself. So what I did was to adjust the paper size settings in the printer.
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Oracle 10gR2 LARGE PAGE SIZE on Windows 2008 x64 SP2

Hello Oracle Experts,
What are the advantages of Large Page Size and how would I know when my DB will benefit from Large Page Sizes?
My undeqrstanding is on Windows x64 – 8kb default page size – will now be 2 MB. Will this speed up accesses to buffer cache? If so is there a latch wait that I can monitor before vs. after to verify that large page size has improved performance?
My Database server has 256GB RAM and SGA is set to 180GB. I am quite sure the overhead involved in maintaining a large number of 8kb allocations (as opposed to 2MB) must be high - how can i monitor this?
I am planning to follow the procedure here:
http://download.oracle.com/docs/html/B13831_01/ap_64bit.htm#CHDGFJJD
The DB is for SAP on a 8CPU/48 core IBM x3950. For some reason SAP documentation does not mention anything about this registry setting or even if Large Page Size is supported in the SAP world.
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My understanding is Oracle would no longer know that some memory is Local (and therefore fast) and some memory is Remote (therefore slow). Overall I am guessing this could cause a real performance issue on this DB.
-points for detailed reply!
thanks a lot -

Hello
Thanks for your reply. I am very interested to hear further about the limitations of Windows 2008 and the benefits of Oracle Linux.
Generally we find that Windows 2008 has been pretty good, a big improvement over Windows 2003 (bluescreens don't occur ever etc)
Can you advise further about Large Page Size for the buffer cache? I assume this applies on both Windows and Linux (I am guessing there is a similiar parameter for 10gR2 on Linux).
SAP have not yet fully supported Oracle 11g so this is why 11g has not made it into the SAP world yet.
Can you also please advise about NUMA? regardless of whether we run Linux or Windows this setting needs to be considered.
Thanks

How to use large pages in AIX with oracle

Hi,
i'm trying to convince oracle to use large pages on AIX 5.3 but haven't
suceeded so far.
i set v_pinshm=1, maxpin%=80, lgpg_regions=448 and lgpg_size=16777216
using 'vmo' and 'LOCK_SGA=true' in spfile. after rebooting and starting
the instance 'svmon' shows no no large pages in use:
# svmon
size inuse free pin virtual
memory 4046848 3711708 335140 2911845 1503108
pg space 524288 5551
work pers clnt lpage
pin 1076604 0 233 1835008
in use 1503010 0 373690 0
pgsize size free
lpage pool 16 MB 448 448
SGA size is 3G. why doesn't oracle use large pages? i already have
created a TAR but maybe an oracle-on-AIX expert can help me faster than
oracle support :)
regards,
-ap

Nice day Andreas,
please do you have some solution for your issue, because I think I have similar problem,
I set on AIX
vmo -r -o lgpg_regions=192 -o lgpg_size=16777216
vmo -o v_pinshm=1
I see in svmon -G this output
PageSize PoolSize inuse pgsp pin virtual
s 4 KB - 1104431 2456 685141 874874
L 16 MB 192 0 0 192 0
these (16MB large pages) are free but when I want run BEA WebLogic server run with parametr -Xlp the application is run with standard 4K memory pages,
thank you very much for any other hint,

Setup issue in oracle projects - classifications link(standard link) is missing in oracle projects page

Hi Team,
I have a setup issue in oracle projects
I am unable to find the classifications link in oracle projects page.
Navigation : Go to any projects responsibility-->search for the projects-->click on project -->click on setup Tab : At the bottom of the page, we can see some standard links along with UDA's.
Here one standard link Classifications is missing.
Can anybody guide me what setup we need to do get the link.
Thank you.

Hi,
The classifications link is not appearing in your Project's Setup page because, Classifications must have been unchecked in the Project template from which your project has been created. You can find the Project template information by clicking on the Additional Information link in the same Project -setup page. Once you check the classification flag in the concerned Project Template, all future Project creations made out of this template would have the link enabled.
But for the current project, classification link cannot be enabled.
Rgds,
Shan

Beginners guide screwed|Is impossible to edit large pages on the wiki

When you're trying to edit a large page on the wiki you get this message:
WARNING: This page is 40 kilobytes long; some browsers may have problems editing pages approaching or longer than 32kb. Please consider breaking the page into smaller sections.
Firefox can handle the 40kb but not the 107kb of the Begginers Guide for example.
And when you do a change, if you dont preview it you get a shiny blank page instead of the document.
I was trying to add one line to the Oficcial installation guide and ended up breaking it into two parts (i move the apendix to another page) to be able to recover it's contents.
Some other person form #archlinux that was helping me with this issue also accidentally override the text from the Beginners guide, and we can't roll back it. So, any WikiAdmin can roll back the changes on the Beginners guide? and tell us (the normal users) how to edit long pages.
Thanks
Last edited by __void__ (2009-01-21 16:34:47)

__void__ wrote:
When you're trying to edit a large page on the wiki you get this message:
WARNING: This page is 40 kilobytes long; some browsers may have problems editing pages approaching or longer than 32kb. Please consider breaking the page into smaller sections.
Firefox can handle the 40kb but not the 107kb of the Begginers Guide for example.
And when you do a change, if you dont preview it you get a shiny blank page instead of the document.
I was trying to add one line to the Oficcial installation guide and ended up breaking it into two parts (i move the apendix to another page) to be able to recover it's contents.
Some other person form #archlinux that was helping me with this issue also accidentally override the text from the Beginners guide, and we can't roll back it. So, any WikiAdmin can roll back the changes on the Beginners guide? and tell us (the normal users) how to edit long pages.
Thanks
Some other person here, sorry about that accidental Beginner's guide trash up
Mr.Elendig wrote:For future reference, don't edit the whole page at once, just edit a section of it. When you are logged in, every section have a 'edit' button/link.
Got it!
Last edited by zaggynl (2009-01-22 09:35:03)

How to Build Custom JSP Page to bypass Oracle Apps Login

Hi All,
Can some one guide me how to develop a custom jsp page to bypass Oracle Apps R12 Login.
Actually Our requirement is some external user will enter the login details in some third party login page with the third party generated username and passwrod, that user's credentials are mapped to oracle system,so as soon as they enter credentials having validated it has to redirect that external user to Oracle Apps R12 Home Page, where responsibilities are shown. Currently that third Party login page is set to redirect to RF.jsp but that is not working and throws this error:
"You are trying to access a page that is no longer active.
- The referring page may have come from a previous session.Please select Home to Proceed"
So I am planning to build a custom jsp page to resolve the error.
As soon as user enter credentials in the third party login page, it will be redirected to my custom login page which in turn redirect external user to Oracle Apps R12 Home Page, where responsibilities are shown. Is it possible? If yes what JSP Page/Servlet I have to invoke from custom JSP Page and what all URL parameters or session parameters and cookies parameter I have to pass or set.
Can anybody please help me...
Its very urgent. We are running short of time. Its a sev 1 issue.
Please reply soon.
Thanks,
Raja Dutta

Hi,
Thanks for the update.
Sir its not about calling the JSP Page from OAF page.
My requirement is what I have explained above.
Please suggest its urgent.
Thanks,
Raja Dutta

Total Shared Global Region in Large Pages = 0 KB (0%)

Hi ,
Am working on Oracle Database 11.2.0.3 ,
Application 12.1.3.
i see this message in the alert log file :
****************** Large Pages Information *****************
Total Shared Global Region in Large Pages = 0 KB (0%)
Large Pages used by this instance: 0 (0 KB)
Large Pages unused system wide = 0 (0 KB) (alloc incr 32 MB)
Large Pages configured system wide = 0 (0 KB)
Large Page size = 2048 KB
RECOMMENDATION:
Total Shared Global Region size is 12 GB. For optimal performance,
prior to the next instance restart increase the number
of unused Large Pages by atleast 6145 2048 KB Large Pages (12 GB)
system wide to get 100% of the Shared
Global Region allocated with Large pages
What should i do ?
Thanks

You definitely are not using hugepagesd. That's what the message you mentioned above is telling you:
Total Shared Global Region in Large Pages = 0 KB (0%)It very clearly tells you that you have 0KB or 0% is in large pages.
Note that the terms "large pages" and "hugepages" are synonymous. In Linux, they're called hugepages.
Also, at the O/S level, you can do:
cat /proc/meminfoTo see how many hugepages are allocated/free/reserved.
Hope that helps,
-Mark

Large page format PDF Cropping

Hi I have recently upgraded to CS5. I am using a Mac Quad Core Intel Xeon with Snow lepoard OS.
My problem is that im trying to PDF a large page size from Indesign, i go through the usual chanel of print setup, i click on Manage Custom Sizes
Enter the new size, return to the setup window ensure every thing is to 100 % scale crop mark etc and save as post script. i then take the document into distiller. The output is an A3 cropped version of the bottom left corner.
I have read Snow lepoard is not dependant on the PDF Wrtiter print drive any more? so should i use my Laser printer driver with the bespoke page size? there seems to be little or contradictory information on this subject.
If any one could offer some insight i would be most grateful. Thanks

This is really an InDesign issue and not PDF, but I'll answer.
Use File->Export to create the PDF.
Creation of PDF from Creative Suite applications should ALWAYS be done using Export/Save As and NEVER using printing.

RAC windows 2003 64bit xeon - Large Pages

Hi all
i have 2 node (windows 2003 64bit dual core xeon, 8GB RAM)
oracle recommendet use large pages on 64bit insted LOCK_SGA, but when i use large pages and i set my sga_target=5GB after few minute in EM i see alert (stronicowanie virtual memory) i dont knew how i can write this, mayby swapping.
how can avoid this?
how i can check that oracle use large pages?
meyby some intresting links?
thanks to advice

You don't run a scalability option on a basically unscabable O/S like Winblows, do you?
Sybrand Bakker
Senior Oracle DBA

Opening Large Pages Files

An odd one... I have a large Pages file (400 or so pages) I've been working on, first in Pages 08 and now in Pages 09. In 08, when I opened the file up, I was presented with the file and the cursor where I last saved it - ie at the very end of the document so I could just type and go. In 09, the cursor is where I left it (ie at the end), but I'm shown on screen what's in the file about 100 pages or so back.
Bug?

Report sent to Apple Bugs Hunters:
Your tracking number for this issue is Bug ID# 6566312.
Hello
Given a long WP Pages document (186 pages).
If I save it with the cursor in page 100 in current display mode, on next opening, the cursor is in page 100.
If I do the same when using "full screen" mode, on next opening, the cursor is at end of doc.
This is what I ALWAYS get on MY machine.
Some users describe the same kind of odd behavior but they ALWAYS get the cursor in the MIDDLE of the document.
Bizarre !
See: http://discussions.apple.com/thread.jspa?threadID=1894090&tstart=0
Yvan KOENIG (from FRANCE samedi 7 février 2009 19:02:12)

Error: Java HotSpot(TM) 64-Bit Server VM warning: JVM cannot use large page

Hi,
i recently came across Error Message (coming up in webadmin Log view):
ProcessMonitor: Java HotSpot(TM) 64-Bit Server VM warning: JVM cannot use large page memory because it does not have enough privilege to lock pages in memory
when running Oracle NoSQL on Windows 7 64bit Home Premium system, having 8GB of physical RAM.
I created the store configuration without explicitly passing a value for parameter memory_mb (was set to -memory_mb 0), so that replication group would take as much
memory as possible, which found it's reflection in following line from store log:
Creating rg1-rn1 on sn1 haPort=tangel-lapp:5.011 helpers=tangel-lapp:5011 mountpoint=null heapMB=7.007 cacheSize=5.143.454.023 -XX:ParallelGCThreads=4
I was a bit surprised because of the fact that i definetly succeeded in running kvstore in this configuration, leading to store using 7007MB of memory.
It was only possible to run kvstore when creating store configuration with memory configured to be less than 2GB.
After searching google with error message mentioned above i came across some hints regarding activation of Huge Pages on Windows 7, which mentioned that it could be
done on systems having at least Windows 7 Professional Edition.
But finally i found a more helpful hint, referring to size of windows pagefile. As my machine uses an SSD as system disk and there some notes on deactivating pagefile when
using an SSD, i did so some time ago.
So i activated the pagefile on windows again and after doing so, the store came up without any problems.
Maybe it's nothing new to some of you guys, but as there was nothing to be read about this fact in neither admin nor getting started guide, i just wanted to share this
piece of information with you.
Regards
Thomas

Charles,
thanks for clarification, obviously i've overseen that in chapter "Installation prerequisites" of
Admin Guide.
By the way, are there any specific OS related settings, let's say "best practice" similar as it is
referred to in documentation of "classic" Oracle Databases?
Regards
Thomas

Large Pages setting

Hello all,
We recently created a new 11.2.0.3 database on Red Hat Linux 5.7. It's running in ASMM
Database settings
sga_target set to 10G
sga_max=12G
memory_target=0.
memory_max=0
pga_aggregate_target =12G.
Host Specs
Total RAM = 128GB
Total CPUs = 4 @ 2.27GHz
Cores/CPU = 8
During instance startup, we get the following message.
****************** Large Pages Information *****************
Total Shared Global Region in Large Pages = 0 KB (0%)
Large Pages used by this instance: 0 (0 KB)
Large Pages unused system wide = 0 (0 KB) (alloc incr 32 MB)
Large Pages configured system wide = 0 (0 KB)
Large Page size = 2048 KB
RECOMMENDATION:
Total Shared Global Region size is 12 GB. For optimal performance,
prior to the next instance restart increase the number
of unused Large Pages by atleast 6145 2048 KB Large Pages (12 GB)
system wide to get 100% of the Shared
Global Region allocated with Large pages
Has anyone seen this recommendation message during startup and acted upon it? if yes, what kind of modification was performed.
Thanks for your time.

From 11.2.0.2 new parameter was added i.e use_large_pages, now whenever the database instance is started it will check for huge pages configuration and there for produce the warning if Oracle will allocate part of the SGA with hugepages and the resting part with normal 4k pages.
USE_LARGE_PAGES parameter has three possible values "true" (default), "only", and "false".
The default value of "true" preserves the current behavior of trying to use hugepages if they are available on the OS. If there are not enough hugepages, small pages will be used for SGA memory.
This may lead to ORA-4031 errors due to the remaining hugepages going unused and more memory being used by the kernel for page tables.
Setting it to "false" means do not use hugepages
A setting of "only" means do not start up the instance if hugepages cannot be used for the whole memory (to avoid an out-of-memory situation).
There is not much written about this yet, but i'm able to find some docs in metalink and from blogs. Hope this help.
Large Pages Information in the Alert Log [ID 1392543.1]
USE_LARGE_PAGES To Enable HugePages In 11.2 [ID 1392497.1]
NOTE:361323.1 - HugePages on Linux: What It Is... and What It Is Not...
Bug 9195408 - DB STARTUP DOES NOT CHECK WHETHER HUGEPAGES ARE ALLOCATED- PROVIDE USE_HUGEPAGES
http://agorbyk.wordpress.com/2012/02/19/oracle-11-2-0-3-and-hugepages-allocation/
http://kevinclosson.wordpress.com/category/use_large_pages/
http://kevinclosson.wordpress.com/category/oracle-automatic-memory-management/

Performance issues with Oracle EE 9.2.0.4 and RedHat 2.1

Hello,
I am having some serious performance issues with Oracle Enterprise Edition 9.2.0.4 and RedHat Linux 2.1. The processor goes berserk at 100% for long (some 5 min.) periods of time, and all the ram memory gets used.
Some environment characteristics:
Machine: Intel Pentium IV 2.0GHz with 1GB of RAM.
OS: RedHat Linux 2.1 Enterprise.
Oracle: Oracle Enterprise Edition 9.2.0.4
Application: We have a small web-application with 10 users (for now) and very basic queries (all in stored procedures). Also we use the latest version of ODP.NET with default connection settings (some low pooling, etc).
Does anyone know what could be going on?
Is anybody else having this similar behavior?
We change from SQL-Server so we are not the world expert on the matter. But we want a reliable system nonetheless.
Please help us out, gives some tips, tricks, or guides
Thanks to all,
Frank

Thank you very much and sorry I couldnt write sooner. It seems that the administrator doesnt see the kswap going on so much, so I dont really know what is going on.
We are looking at some queries and some indexing but this is nuts, if I had some poor queries, which we dont really, the server would show pick right?
But he goes crazy and has two oracle processes taking all the resources. There seems to be little swapping going on.
Son now what? They are all ready talking about MS-SQL please help me out here, this is crazy!!!
We have, may be the most powerful combinations here. What is oracle doing?
We even kill the Working Process of the IIS and have no one do anything with the database and still dose two processes going on.
Can some one help me?
Thanks,
Frank

Large Pages Issue in Oracle.

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