Maximum number of JSPs in WLS 6.1

          I'm running some experiments to see how many JSP/classes a single Weblogic 6.1
          instance can handle. I have a simple JSP, duplicated 10,000 times on the filesystem,
          and a load test tool does a GET to the server for each JSP one at a time (ie,
          only 1 virtual user hitting the server, not a load test)
          On Solaris, when running with JAVA_OPTIONS="-hotspot", around 3700 JSPs the VM
          crashes with a hotspot error. When using -server instead of -hotspot, around
          9700 the VM doesn't crash but the app. server no longer responds to requests.
          Heap usage is less than 100MB at this time, and some messages to stdout prior
          to "hanging" indicate classes are being freed from the VM.
          Does this number seem a little low?

Neither number seems low.
          Classes are stored in the 'Method Area' of the JVM - not the Java Heap.
          There is a bug in some 1.3.x version of the Solaris JVM which causes the JVM
          to crash when the Method Area becomes full (instead of being garbage
          collected). Setting -XX:MaxPermSize=64M may help
          Mike
          "lhartford" <[email protected]> wrote in message
          news:3c10e68f$[email protected]..
          >
          > I'm running some experiments to see how many JSP/classes a single Weblogic
          6.1
          > instance can handle. I have a simple JSP, duplicated 10,000 times on the
          filesystem,
          > and a load test tool does a GET to the server for each JSP one at a time
          (ie,
          > only 1 virtual user hitting the server, not a load test)
          >
          > On Solaris, when running with JAVA_OPTIONS="-hotspot", around 3700 JSPs
          the VM
          > crashes with a hotspot error. When using -server instead of -hotspot,
          around
          > 9700 the VM doesn't crash but the app. server no longer responds to
          requests.
          > Heap usage is less than 100MB at this time, and some messages to stdout
          prior
          > to "hanging" indicate classes are being freed from the VM.
          >
          > Does this number seem a little low?
          >

Similar Messages

Large number of JSP performance

Hi,
a colleague of me made tests with a large number of JSP and identified a
performance problem.
I believe I found a solution to his problem. I tested it with WLS 5.1 SP2
and SP3 and MS jview SDK 4.
The issue was related to the duration of the initial call of the nth JSP,
our situation as we are doing site hosting.
The solution is able to perform around 14 initial invocations/s no matter if
the invocation is the first one or the
3000th one and the throughput can go up to 108 JSPs/s when the JSP are
already loaded, the JSPs being the
snoopservlet example copied 3000 times.
The ratio have more interest than the values as the test machine (client and
WLS 5.1) was a 266Mhz laptop.
I repeat the post of Marc on 2/11/2000 as it is an old one:
Hi all,
I'm wondering if any of you has experienced performance issue whendeploying
a lot of JSPs.
I'm running Weblogic 4.51SP4 with performance pack on NT4 and Jdk1.2.2.
I deployed over 3000 JSPs (identical but with a distinct name) on myserver.
I took care to precompile them off-line.
To run my tests I used a servlet selecting randomly one of them and
redirecting the request.
getServletContext().getRequestDispatcher(randomUrl).forward(request,response);
The response-time slow-down dramaticaly as the number of distinct JSPs
invoked is growing.
(up to 100 times the initial response time).
I made some additional tests.
When you set the properties:
weblogic.httpd.servlet.reloadCheckSecs=-1
weblogic.httpd.initArgs.*.jsp=..., pageCheckSeconds=-1, ...
Then the response-time for a new JSP seems linked to a "capacity increase
process" and depends on the number of previously activated JSPs. If you
invoke a previously loaded page the server answers really fast with no
delay.
If you set previous properties to any other value (0 for example) the
response-time remains bad even when you invoke a previously loaded page.SOLUTION DESCRIPTION
Intent
The package described below is design to allow
* Fast invocation even with a large number of pages (which can be the case
with Web Hosting)
* Dynamic update of compiled JSP
Implementation
The current implementation has been tested with JDK 1.1 only and works with
MS SDK 4.0.
It has been tested with WLS 5.1 with service packs 2 and 3.
It should work with most application servers, as its requirements are
limited. It requires
a JSP to be able to invoke a class loader.
Principle
For a fast invocation, it does not support dynamic compilation as described
in the JSP
model.
There is no automatic recognition of modifications. Instead a JSP is made
available to
invalidate pages which must be updated.
We assume pages managed through this package to be declared in
weblogic.properties as
weblogic.httpd.register.*.ocg=ocgLoaderPkg.ocgServlet
This definition means that, when a servlet or JSP with a .ocg extension is
requested, it is
forwarded to the package.
It implies 2 things:
* Regular JSP handling and package based handling can coexist in the same
Application Server
instance.
* It is possible to extend the implementation to support many extensions
with as many
package instances.
The package (ocgLoaderPkg) contains 2 classes:
* ocgServlet, a servlet instantiating JSP objects using a class loader.
* ocgLoader, the class loader itself.
A single class loader object is created.
Both the JSP instances and classes are cached in hashtables.
The invalidation JSP is named jspUpdate.jsp.
To invalidate an JSP, it has simply to remove object and cache entries from
the caches.
ocgServlet
* Lazily creates the class loader.
* Retrieves the target JSP instance from the cache, if possible.
* Otherwise it uses the class loader to retrieve the target JSP class,
create a target JSP
instance and stores it in the cache.
* Forwards the request to the target JSP instance.
ocgLoader
* If the requested class has not the extension ocgServlet is configured to
process, it
behaves as a regular class loader and forwards the request to the parent
or system class
loader.
* Otherwise, it retrieves the class from the cache, if possible.
* Otherwise, it loads the class.
Do you thing it is a good solution?
I believe that solution is faster than standard WLS one, because it is a
very small piece of code but too because:
- my class loader is deterministic, if the file has the right extension I
don't call the classloader hierarchy first
- I don't try supporting jars. It has been one of the hardest design
decision. We definitely need a way to
update a specific page but at the same time someone post us NT could have
problems handling
3000 files in the same directory (it seems he was wrong).
- I don't try to check if a class has been updated. I have to ask for
refresh using a JSP now but it could be an EJB.
- I don't try to check if a source has been updated.
- As I know the number of JSP I can set pretty accurately the initial
capacity of the hashtables I use as caches. I
avoid rehash.

Use a profiler to find the bottlenecks in the system. You need to determine where the performance problems (if you even have any) are happening. We can't do that for you.

Large number of JSP performance [repost for grandemange]

Hi,
a colleague of me made tests with a large number of JSP and identified a
performance problem.
I believe I found a solution to his problem. I tested it with WLS 5.1 SP2
and SP3 and MS jview SDK 4.
The issue was related to the duration of the initial call of the nth JSP,
our situation as we are doing site hosting.
The solution is able to perform around 14 initial invocations/s no matter if
the invocation is the first one or the
3000th one and the throughput can go up to 108 JSPs/s when the JSP are
already loaded, the JSPs being the
snoopservlet example copied 3000 times.
The ratio have more interest than the values as the test machine (client and
WLS 5.1) was a 266Mhz laptop.
I repeat the post of Marc on 2/11/2000 as it is an old one:
Hi all,
I'm wondering if any of you has experienced performance issue whendeploying
a lot of JSPs.
I'm running Weblogic 4.51SP4 with performance pack on NT4 and Jdk1.2.2.
I deployed over 3000 JSPs (identical but with a distinct name) on myserver.
I took care to precompile them off-line.
To run my tests I used a servlet selecting randomly one of them and
redirecting the request.
getServletContext().getRequestDispatcher(randomUrl).forward(request,response);
The response-time slow-down dramaticaly as the number of distinct JSPs
invoked is growing.
(up to 100 times the initial response time).
I made some additional tests.
When you set the properties:
weblogic.httpd.servlet.reloadCheckSecs=-1
weblogic.httpd.initArgs.*.jsp=..., pageCheckSeconds=-1, ...
Then the response-time for a new JSP seems linked to a "capacity increase
process" and depends on the number of previously activated JSPs. If you
invoke a previously loaded page the server answers really fast with no
delay.
If you set previous properties to any other value (0 for example) the
response-time remains bad even when you invoke a previously loaded page.SOLUTION DESCRIPTION
Intent
The package described below is design to allow
* Fast invocation even with a large number of pages (which can be the case
with Web Hosting)
* Dynamic update of compiled JSP
Implementation
The current implementation has been tested with JDK 1.1 only and works with
MS SDK 4.0.
It has been tested with WLS 5.1 with service packs 2 and 3.
It should work with most application servers, as its requirements are
limited. It requires
a JSP to be able to invoke a class loader.
Principle
For a fast invocation, it does not support dynamic compilation as described
in the JSP
model.
There is no automatic recognition of modifications. Instead a JSP is made
available to
invalidate pages which must be updated.
We assume pages managed through this package to be declared in
weblogic.properties as
weblogic.httpd.register.*.ocg=ocgLoaderPkg.ocgServlet
This definition means that, when a servlet or JSP with a .ocg extension is
requested, it is
forwarded to the package.
It implies 2 things:
* Regular JSP handling and package based handling can coexist in the same
Application Server
instance.
* It is possible to extend the implementation to support many extensions
with as many
package instances.
The package (ocgLoaderPkg) contains 2 classes:
* ocgServlet, a servlet instantiating JSP objects using a class loader.
* ocgLoader, the class loader itself.
A single class loader object is created.
Both the JSP instances and classes are cached in hashtables.
The invalidation JSP is named jspUpdate.jsp.
To invalidate an JSP, it has simply to remove object and cache entries from
the caches.
ocgServlet
* Lazily creates the class loader.
* Retrieves the target JSP instance from the cache, if possible.
* Otherwise it uses the class loader to retrieve the target JSP class,
create a target JSP
instance and stores it in the cache.
* Forwards the request to the target JSP instance.
ocgLoader
* If the requested class has not the extension ocgServlet is configured to
process, it
behaves as a regular class loader and forwards the request to the parent
or system class
loader.
* Otherwise, it retrieves the class from the cache, if possible.
* Otherwise, it loads the class.
Do you thing it is a good solution?
I believe that solution is faster than standard WLS one, because it is a
very small piece of code but too because:
- my class loader is deterministic, if the file has the right extension I
don't call the classloader hierarchy first
- I don't try supporting jars. It has been one of the hardest design
decision. We definitely need a way to
update a specific page but at the same time someone post us NT could have
problems handling
3000 files in the same directory (it seems he was wrong).
- I don't try to check if a class has been updated. I have to ask for
refresh using a JSP now but it could be an EJB.
- I don't try to check if a source has been updated.
- As I know the number of JSP I can set pretty accurately the initial
capacity of the hashtables I use as caches. I
avoid rehash.
Cheers - Wei

I dont know the upper limit, but I think 80 is too much. I have never used more than 15-20. For Nav attributes, a seperate tables are created which causes the Performance issue as result in new join at query run time. Just ask your business guy, if these can be reduced.One way could be to model these attributes as seperate characteristics. It will certainly help.
Thanks...
Shambhu

Maximum number of static mappings?

what is the maximum number of static nat mappings supported?

Alberto,
It appears that in the past few days you have not received a response to your posting. That concerns us, and has triggered this automated reply.
Has your problem been resolved? If not, you might try one of the following options:
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If this is a reply to a duplicate posting, please ignore and accept our apologies and rest assured we will issue a stern reprimand to our posting bot.
Good luck!
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The maximum number of instances has been exceeded

Hi,
I my PROD environment i am getting this type of exception.
Instance Cache: Opening the cache for process '/ProcessName#Default-1.0'. The maximum number of instances has been exceeded.
any suggestion ?
Thanks,
Brijesh Kumar Singh

Hi Brijesh,
Please post the Complete StackTrace. When are you getting this exception...means which operation are u performing?
Are u in a Clustered Environment?
Which version of WLS are u using?
by anychance Are you getting the following Oracle Error Code in your Server Logs anywhere: ORA-00020 ?
Thanks
Jay SenSharma
http://jaysensharma.wordpress.com (WebLogic Wonders Are Here)

Maximum number of domains per physical server

I am curious as to whether or not there is a maximum number of domains per physical server. Is it just based on resources, i.e. memory, hdd space, etc. or does Oracle have it's own specific recommendations? I realize, as implied, that one could put a number of vm's on a server that would utilize the server ram up to an amount reserved for the OS.
Just wondering if there is a recommendation.
By the way, we are running WLS (10.0MP1) and OSB (3.0) on top of Win2K3.
Thanks for nay info,
Todd

Typically it depends on the resources.
If the WLS instances are heavily utilized, at some point having more JVM's than the number of cores impacts performance if the apps are CPU bound. Similar applies for apps that use a lot of memory or sessions. There is no blanket answer and there is no hard and fast limit.

Maximum number of sessions has already been reached...

I have a web application which is made up of a servlet and some jsps. I run a test which puts a load on the webserver which sends multiple requests to the webserver so we can monitor the load.
The problem is, my application is not handling anything gracefully when the webserver reaches it's max # of sessions. I don't want to change the default 1000 sessions, but I want to direct users to a friendly error page if this situation ever occurs.
This is the beginning of my doGet method:
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
try {
java.sql.Date fromDate = null;
java.sql.Date toDate = null;
String storySection = null;
int history = 0;
int numberOfRecords = 0;;
HttpSession session = request.getSession(true);
System.out.println("Checking if session is null***");
if(session == null) throw new SQLException("SESSION IS NULL!");
if(request.isRequestedSessionIdValid() == false) throw new SQLException("SESSION NOT VALID!");
System.out.println("Session passed fine!!!!!!!!!!!!!!");
This is the output from iPlanet 4.1SP5 errors log file:
--- (messages before this point were just loading jsp + servlets; i.e. no errors before this point) ---
[28/Feb/2002:09:44:21] info (21849): Internal Info: loading servlet /mmd/SquawkMessage.jsp
[28/Feb/2002:09:48:09] warning (21849): SimpleSessionManager: cannot create a new session as the limit on maximum number of sessions has already been reached: (1000)
[28/Feb/2002:09:48:09] failure (21849): Internal error: exception thrown from the servlet service function (uri=/mmd/SquawkHeadlines.jsp): java.lang.NullPointer
Exception, Stack: java.lang.NullPointerException
at jsps.mmd._SquawkHeadlines_jsp._jspService(Compiled Code)
at org.apache.jasper.runtime.HttpJspBase.service(Compiled Code)
at javax.servlet.http.HttpServlet.service(Compiled Code)
at com.netscape.server.http.servlet.NSServletRunner.Service(Compiled Code)
--- (messages after this point were more of the same until I killed the load test) ---
Any advice? I need to find out how to handle this problem gracefully.
Thank you,
Karen
[email protected]

Hi,
You can have an application variable that increments by one, when each new session is started. That way you can check whether the total no.of sessions have reached 1000, if yes, u can redirect the user to an error page.
Please get back to me if u still can't get the problem solved.
SURESH B
[email protected]

Illustrator won't run: "unable to set maximum number of files to be opened"

I have an intel macbook pro (core duo with 2GB ram) and a copy of purchased adobe creative suite 2. Other applications in the suite like photoshop, acrobat, etc can run on my mac without any problem. But when I try to run illustrator, it just shows an error message "Unable to set maximum number of files to be opened" and quits. I also installed a trial version of illustrator cs3 and got the same problem. Can anyone help? Thanks.
CC

Hi, I realize this is an old thread but it was unanswered and the issue has come up again in a newer thread:
http://forums.adobe.com/message/2534652
If the original poster sees this, can you reply tin the new thread and let us know if you were ever to solve this problem?
Thanks!

How to find maximum number of users we can assign for Hyperion Planning.

HI,
How to find maximum number of users we can assign for Hyperion Planning.i.e., how to find license limit in hyperion planning 11.1.2.1.
In Essbase propreties, the system is showing maximum planning users could be 65535.
what would be the number for concurrent scenario?
Thanks
Giri
Edited by: Giriprasad on Jun 18, 2012 2:18 AM

The number of users would be based on your license agreement with Oracle, the system is not aware of your license agreement so it is up to you to stick to it.
Cheers
John
http://john-goodwin.blogspot.com/

How to set up the maximum number of messages on a queue programmatically

Hi,
I am using IMQ 3.5 to implement a message layer for one of my projects. I created a "Job Status Queue", which receives job status report from a java application every minute. But I just want to keep the most current status report instead of all the job running history. How can I restrict the maximum number of messages to 1 programmatically?
Any suggestion or help will be appreciated.
Xiaoyun Tang

You can't limit the destination size programmatically, but you can do it administratively and associate a behavior to occur when the limit is reached. In your case it sounds like you want a queue, 1 message deep, and to discard the oldest message when the queue is full. When you create the physical queue on the broker you can specify these attributes (you can also update them on an existing queue). For example:
imqcmd create dst -t q -n StatusQ -o maxNumMsgs=1 -o limitBehavior=REMOVE_OLDESTFor more information see Chapter 6 of the Message Queue Administration Guide. In particular the "Managing Destinations" section:
http://docs.sun.com/app/docs/coll/MessageQueue_35_SP1
Joe

I am trying to setup iCloud account and when I login I see a popup. The Maximum number of free accounts have been activated on this iPhone. Pls, help me fix it. What other accounts? Thanks

I am trying to setup iCloud account and when I login I see a popup. The Maximum number of free accounts have been activated on this iPhone. Pls, help me fix it. What other accounts? Thanks

Then you'll have to use another iOS device or Mac running OS X Lion or higher to create a new account for you to use on your phone. If you don't have one, perhaps a friend would allow you to create and account on their device (note: this will use one of their three maximum accounts). To do this, they would need to go to Settings>iCloud, tap Delete Account (which will delete the account from their device but not from iCloud), then allow you to sign back in with your ID to create the new account. Then tap Delete Account to delete the new account from their device, and finally, sign back in with their iCloud ID to restore their iCloud account to their device. Then you can sign in with your ID on your phone in Settings>iCloud and use the new account.

Error message in the report: Exceeded configured maximum number of allowed

Hi,
When i'm running one report, it's throwing the following error.
Error
View Display Error
Exceeded configured maximum number of allowed input records.
Error Details
Error Codes: EKMT3FK5:OI2DL65P
SQL Issued: 3302~v9p2gfbm0sfk91lrj16oe7srm2
This is most common error. my report is retreiving 469,501 rows in the database.
These are the settings in the instanceconfig.xml :
<Views>
- <Pivot>
<MaxPagesToRollOutInDelivery>1000</MaxPagesToRollOutInDelivery>
<MaxVisibleColumns>500</MaxVisibleColumns>
<MaxVisiblePages>2500</MaxVisiblePages>
<MaxVisibleRows>1000000</MaxVisibleRows>
<MaxVisibleSections>10000</MaxVisibleSections>
<DefaultRowsDisplayed>1000000</DefaultRowsDisplayed>
- 
<DefaultRowsDisplayedInDelivery>1000</DefaultRowsDisplayedInDelivery>
- 
<DefaultRowsDisplayedInDownload>100000</DefaultRowsDisplayedInDownload>
- 
<DisableAutoPreview>false</DisableAutoPreview>
</Pivot>
Max visible rows are higher than my report rows, but still it is throwing error.
Please any suggestions !!!!
Thanks in Advance

Just in case try to set other views and see how it works
http://docs.oracle.com/cd/E23943_01/bi.1111/e10541/answersconfigset.htm#CIHHBHEB
In WebLogic FMW Control or EM:
http://server.domain:7001/em
Click on Fam_bifoundation_domain -> Business Intelligence -> coreapplications -> Capacity Management -> Performance
Maximum Number of Rows Processed when Rendering a Table View
Number Of Rows:
Maximum Number of Rows to Download
Number Of Rows

I'm using acrobat pro in my project after debuging the project and after opening a certain number of PDF files I receive the message: the maximum number of files opened has been reached, you have to close some files to continu.even doing that, I steel rec

I'm using acrobat pro in my project after debuging the project and after opening a certain number of PDF files I receive the message: the maximum number of files opened has been reached, you have to close some files to continu.even doing that, I steel receive the same message.Some one can tel what to do please? Thanks

Hi Memalyn
Essentially, the bare issue is that you have a 500GB hard drive with only 10GB free. That is not sufficient to run the system properly. The two options you have are to move/remove files to another location, or to install a larger hard drive (eg 2TB). Drive space has nothing to do with SMC firmware, and usually large media files are to blame.
My first recommendation is this: download and run the free OmniDiskSweeper. This will identify the exact size of all your folders - you can drill down into the subfolders and figure out where your largest culprits are. For example, you might find that your Pictures folder contains both an iPhoto Library and copies that you've brought in from a camera but are outside the iPhoto Library structure. Or perhaps you have a lot of purchased video content in iTunes.
If you find files that you KNOW you do not need, you can delete them. Don't delete them just because you have a backup, since if the backup fails, you will lose all your copies.
Don't worry about "cleaners" for now - they don't save much space and can actually cause problems. Deal with the large file situation first and see how you get on.
Let us know what you find out, and if you manage to get your space back.
Matt

HT204053 I have an iPhone 4S and when I try to add an iCloud account is gives me an error "Cannot Sign In, The maximum number of free accounts have been activated on this iPhone." Is there any way to deactivate an account?

I have an iPhone 4S and when I try to add an iCloud account is gives me an error "Cannot Sign In, The maximum number of free accounts have been activated on this iPhone." Is there any way to deactivate an account? I have one for myself, one for my family and one for my work. I had all three on my iphone and then I deleted my work. I wanted to get my own person @me.com account. It wouldn't let me create it from my iphone, so I created it from my Macbook Pro. I am trying to add it to my iphone, but it keeps giving me that error. If there is a way I can deactivate my work one so I can use my @me.com personal account?

Welcome to the Apple Community.
Unfortunately once all the 3 iCloud accounts have been created on your mobile device, you cannot create any more regardless of what you do. You will need to re-use one of the accounts that you have already created or create your new account on another device or computer.
You should however be able to add existing accounts to your device, are you sure you aren't trying to create on rather than simply use an existing one.

Maximum number of photos that can be imported into an iPhoto library?

1. Does iPhoto have a maximum number of files or photos that it can handle in a single library?
I have a lot of photos (20GB) that have not yet been imported into an iPhoto Library. I am going to set up a new library with the iPhoto Library Manager (iPLM), but am wondering if there is a maximum number of files that can be handled in a single library?
2. Also, I don't think I want to import these, since that would create an iPhoto library as large as the source files. Are there any problems if I set up the preferences so that this library will not have the graphics imported into it?
3. With iPLM, can you have different sets of preferences for each library?
Thank you for any advice or suggestions.

1. Does iPhoto have a maximum number of files or photos that it can handle in a single library?
Apple advertises that iPhoto will handle 250,000 photos - I doubt that anyone has come close to that (or will)
I have 19,278 in 237 events - 22 GB - on a G5 iMac and it is snappy with no issues
I have a lot of photos (20GB) that have not yet been imported into an iPhoto Library. I am going to set up a new library with the iPhoto Library Manager (iPLM), but am wondering if there is a maximum number of files that can be handled in a single library?
If you want those should be fine in one library
2. Also, I don't think I want to import these, since that would create an iPhoto library as large as the source files. Are there any problems if I set up the preferences so that this library will not have the graphics imported into it?
It is a choice - if you do NOT import them then you will be responsible for all future management - deleting, etc. Moving to a different location or computer is much more difficult if you reference your photos instead of importing them.
Many people import them, burn the original source photos to CD or DVD and delete them from their disk letting iPhoto manage them
3. With iPLM, can you have different sets of preferences for each library?
I'm not sure but I do not think so
Larry Nebel
Message was edited by: LarryHN

Maximum number of JSPs in WLS 6.1

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