Performance Impact of Using Sessions

All,
I have a general question regarding the performance impact of using Sessions
within a Servlet. Specifically, I'm working with a group that wants to use
the Session object to store customer contacts temporarily. The application
is expected to service 2000 concurrent users, each maintaining no more then
200 contacts each of which is about 1KB. The planned configuration is for a
cluster of 10 instances of WLS. That said do we have any benchmark data
that might assist in the session replication design, i.e. using in-memory
across the cluster, using DBMS, etc.?
Any information would be appreciated.
Later,
Jim Harrald
BEA Systems
Office: (901)263-4097
Cell: (901)568-9267
email: [email protected]

Similar Messages

Performance impact of using Web Services?

As BEA and other vendors continue to add Web Services support
to their enterprise software, what is your plan for
quantifying the performance impact and the functional
correctness of using web services before going live with the
final application?
Empirix is hosting a free one hour web event discussion on
web services testing and automated web services testing
solutions on Thursday, January 17, 2-3pm Eastern time.
To sign-up for this web event or learn about other web
events being offering by Empirix this month, go to:
http://webevents.empirix.com
For your convenience, here is the complete abstract:
The advent of web services has brought the promises of
integrating multiple software applications from
heterogeneous networks and for exchanging information
from vendor-to-vendor or vendor-to-consumer in a
standardized way.
As web service technologies are deployed within and across
organizations over the next several years, it will be
critical that web services undergo performance testing.
As with any enterprise software project, the adoption of
proper test methodologies and use of testing tools will
play a key part in the overall success or failure of
projects utilizing web services. In a compressed
software project schedule, an organization must
quickly determine if its web services will operate
successfully under a variety of load conditions. Like other
web-based technologies, successful web services will need
to respond quickly and correctly when implemented.
During our presentation, we will discuss the testing
challenges created by this emerging technology, along with
the variety of testing solutions available. Automated
web service testing will be discussed and demonstrated
using FirstACT, the first web services performance testing solution available
on the market. Using a sample web
service, automatic test case creation, scalability testing,
and results analysis will be explored.
If you wish to download FirstACT prior to the web event, you can do so at:
http://www.empirix.com/downloads/FirstACT

As BEA and other vendors continue to add Web Services support
to their enterprise software, what is your plan for
quantifying the performance impact and the functional
correctness of using web services before going live with the
final application?
Empirix is hosting a free one hour web event discussion on
web services testing and automated web services testing
solutions on Thursday, January 17, 2-3pm Eastern time.
To sign-up for this web event or learn about other web
events being offering by Empirix this month, go to:
http://webevents.empirix.com
For your convenience, here is the complete abstract:
The advent of web services has brought the promises of
integrating multiple software applications from
heterogeneous networks and for exchanging information
from vendor-to-vendor or vendor-to-consumer in a
standardized way.
As web service technologies are deployed within and across
organizations over the next several years, it will be
critical that web services undergo performance testing.
As with any enterprise software project, the adoption of
proper test methodologies and use of testing tools will
play a key part in the overall success or failure of
projects utilizing web services. In a compressed
software project schedule, an organization must
quickly determine if its web services will operate
successfully under a variety of load conditions. Like other
web-based technologies, successful web services will need
to respond quickly and correctly when implemented.
During our presentation, we will discuss the testing
challenges created by this emerging technology, along with
the variety of testing solutions available. Automated
web service testing will be discussed and demonstrated
using FirstACT, the first web services performance testing solution available
on the market. Using a sample web
service, automatic test case creation, scalability testing,
and results analysis will be explored.
If you wish to download FirstACT prior to the web event, you can do so at:
http://www.empirix.com/downloads/FirstACT

Performance Impact When Using SNC Communication

Hello,
Does anybody know if and how much performance impact there is if we use SNC for communication between the SAP Server and SAPGUI?
I think there are two areas that may be impacted; Network and server CPU.
For network load, I did find a part in "Front-End Network Requirements for SAP Business Solutions" document saying "overhead of roughly 350 bytes per user interaction step" but it does not specify the type of encryption. I wonder if there is any other info on this?
For CPU impact, how much overhead should I consider for sapgui access?
I see no field for this in the quicksizer and I can't seem to find any white papers on this subject.
Thank you in advance.

>
Peter Adams wrote:
> Ken,
>
> if you plan to use SAPcryptlib for SNC between SAP servers, then you should use a SAPcryptolib-compatible solution for the SNC communication between SAPGUI and SAP server, and there is only one vendor who can provide this. Let me know, if you need help finding it. My contact information is in my SDN business card.
Just so Kan is clear - It is not legal to use the SAP cryptolib provided by SAP for SNC between SAP GUI and SAP servers, so if x.509 is the desired mechanism you need to purchase additional software from the company which Peter works for to provide SAP GUI SNC-based SSO. I think instead, Kan might be using the free SAP supplied SNC Kerberos library, which is why I asked him to confirm this in my last post. I doubt he is interested to buy any third party software.
> As to the performance discussion: first of all, yes, there will be a small performance impact if SNC is used (no matter which type or implementation), but from our experience with many actual SNC implementations, I can state that this is practically not relevant. It is not noticeable by users. There were never any performance discussions with customers. See also SAP Note 1043694.
I agree with this - the performance impact is not noticed by users, but the system managers who look after the servers where SAP is installed, and the team responsible for the network need to be aware of any differences (if any) when SNC is turned on and when SNC is turned off. I think this is why Kan is asking these questions, not because he is concerned about users noticing any difference when they logon to SAP.
> Just a first quick comment on certain statements above: Tim's arguments for proving his overall statement are not conclusive from my perspective. Nor do I think his overall statement itself is correct.
The facts I mentioned are well known facts, e.g. symmetric crypto is far better from performance point of view than asymmetric. I know the examples I have shown which I found when doing a quick google search were not conclusive, but they were shown as initial examples, not necessarily the best examples. This is why I specifically mentioned that if you search in google yourself you will see many more references where comparisons are done between Kerberos (e.g. symmatric) compared with PKI (e.g. asymmetric).
> First of all, he only selects one aspect of performance - CPU impact of encryption algorithms.
No, I didn't. Some of the examples I referred to also discuss other differences. I also mentioend other differences such as memory and what protection level is used when configuring SNC.
> But for a true comparison, you'd have to look at all relevant aspects (latency, network overhead, ...).
Yes, I agree. No doubts here.
>Network performance overhead is usuallly worse with Kerberos than with PKI.
This is not true. When SAP is using SNC, the GSS-API standard is used and so the only network communication involves SAP software sending a standard GSS token from the workstation to the SAP server, and this GSS token is often about the same size, regardless of which mechanism is used, so any network performance differences are not related to the mechanism, but more related to the complexity of the cryptography used on each end (mostly on the server side).
>Second, you need to look at the specific usage scenario. For example, the first report referenced by Tim is an analysis about different Token Profile mechanism for WS Security, for one specific implementation. This does not allow to draw any conclusion for the SNC use case in general, and for sure not for a specific implemenation. It does not take the overhead for the encryption of the message content into account. Third, Tim associates PKI exclusively with asymmetric encryption. Yes, it is well known that asymmetric algorithms are slower than symmetric ones, but it is also well known that the encryption of the message content (by far the majority of the data) happens with symmetric encryption algorithms in the PKI scenario. With PKI-based SNC, you can even select a symmetric algorithm and use a more performant one that the ones that Kerberos prescribes.
Kerberos works with many different symmetric algorithms as well, so mentioning that the alg is selectable is not relavent to any comparison.
> To summarize, I will try and collect facts that will support the opposite point of view. From our practical experience, the performance overhead is not relevant, and criteria like consistency with SAPcryptolib, strength of security, ease of administration, choice of authentication and encryption mechanism, etc. are much more important.
>
> Peter

Performance impact on using too much try catch block

I have several questions here:
1. The system that I'm developing requires to be high performance, but I am not sure how will try catch block affect overall performance.
2. I wanted to know which would be more efficient (result in faster processing)
Have several generic try catch OR catch all exceptions individually?
ex:
try {
} catch (Exception e){
}vs.
try{
} catch (MalformedUrlException me){
} catch(SQLException){
}3. Which one would be faster, one big try catch block or several small try catch blocks?
ex.
try{
//read from io file
//query database
//parse data
//write to file
//query database again
} catch(Exception e){
//log exception
}vs.
try{
//read from io file
} catch(FileNotFoundException fnfe){
//log exception
try{
//query database
}catch(SQLException se){
//log exception
try{
//parse data
}catch(SaxParserException saxe){
//log exception
try{
//query database again
}catch(SQLException se2){
//log exception
try{
//write to file
} catch(FileNotFoundException fnfe){
//log exception

1. The system that I'm developing requires to be high performance, but I am not sure how will try catch block affect overall performance.Compared to what? You can't write an equivalent program that doesn't have a try-catch block, so the answer would have to be that it doesn't affect performance at all.
2. I wanted to know which would be more efficient (result in faster processing)Have several generic try catch OR catch all exceptions individually?
You still have it backwards. Do you need to do different things for different exceptions? If so, then that's what you have to do and there is no other code that might be "faster".
Here's what you should do. Write the code that needs to be written. Don't leave out necessary stuff because of performance reasons. (If you left out all your code, the program would run much faster.) Then find out which parts of the program ACTUALLY take the most time and work on speeding them up.

Performance Impact for the Application when using ADFLogger

Hi All,
I am very new to ADFLogger and I am going to implement this in my Application. I go through Duncan Mill's acticles and got the basic understanding.
I have some questions to be clear.
Is there any Performance Impact when using ADFLogger to slower the Appllication.
Is there any Best Practices to follow with ADFLogger to minimize the negative impact(if exists).
Thanks
Dk

Well, add a call to a logger is a method call. So if you add a log message for every line of code, you'll see an impact.
You can implement it in a way that you only write the log messages if the log level if set to a level which your logger writes (or lower). In this case the impact is like having an if statement, and a method call if the if statement returns true.
After this theory here is my personal finding, as I use ADFLogger quite a lot. In production systems you turn the log lever to WARNING or higher so you will not see many log messages in the log. Only when a problem is reported you set the log level to a lower value to get more output.
I normally use the 'check log level before logging a message' and the 'just print the message' combined. When I know that a message is printed very often, I first check the level. If I assume or know that a message is only logged seldom, I just log it.
I personally have not seen a negative impact this way.
Timo

Performance Impact with OR concatenation / Inlist Iterator

Hello guys,
is there any performance impact with using OR concatenations or some IN-Lists?
The function of both is the "same":
1) Concatenation (OR-processing)
SELECT * FROM emp WHERE mgr# = 1 OR job = ‘YOURS’;- Similar to query rewrite into 2 seperate queries
- Which are then ‘concatenated’
2) Inlist Iterator
SELECT * FROM dept WHERE d# in (10,20,30);- Iteration over enumerated value-list
- Every value executed seperately
- Same as concatenation of 3 “OR-red” values
So i want to know if there is any performance impact if using IN-Lists instead of OR concatenations.
Thanks and Regards
Stefan

The note is very misleading and far from complete; but there is one critical point of difference that you need to observe. It's talking about using a tablescan to deal with an IN-list (and that's NOT "in-list iteration"), my comments start by saying "if there is a suitable indexed access path."
The note, by the way, describes a transformation to a UNION ALL - clearly that would be inefficient if there were no indexed access path. (Given the choice between one tablescan and several consecutive tablescans, which option would you choose ?).
The note, in effect, is just about a slightly more subtle version of "why isn't oracle using my index". For "shorter" lists you might get an indexed iteration, for "longer" lists you might get a tablescan.
Remember, Metalink is not perfect; most of it is just written by ordinary people who learned about Oracle in the normal fashion.
Quick example to demonstrate the difference between concatenation and iteration:
drop table t1;
create table t1 as
select
     rownum     id,
     rownum     n1,
     rpad('x',100)     padding
from
     all_objects
where
     rownum <= 10000
create index t1_i1 on t1(id);
execute dbms_stats.gather_table_stats(user,'t1')
set autotrace traceonly explain
select
     /*+ use_concat(t1) */
     n1
from
     t1
where
     id in (10,20,30,40,50,60,70,80,90,100)
set autotrace offThe execution plan I got from 8.1.7.4 was as follows - showing the transformation to a UNION ALL - this is concatenation and required 10 query block optimisations (which were all done three times):
Execution Plan
   0      SELECT STATEMENT Optimizer=ALL_ROWS (Cost=20 Card=10 Bytes=80)
   1    0   CONCATENATION
   2    1     TABLE ACCESS (BY INDEX ROWID) OF 'T1' (Cost=2 Card=1 Bytes=8)
   3    2       INDEX (RANGE SCAN) OF 'T1_I1' (NON-UNIQUE) (Cost=1 Card=1)
   4    1     TABLE ACCESS (BY INDEX ROWID) OF 'T1' (Cost=2 Card=1 Bytes=8)
   5    4       INDEX (RANGE SCAN) OF 'T1_I1' (NON-UNIQUE) (Cost=1 Card=1)
   6    1     TABLE ACCESS (BY INDEX ROWID) OF 'T1' (Cost=2 Card=1 Bytes=8)
   7    6       INDEX (RANGE SCAN) OF 'T1_I1' (NON-UNIQUE) (Cost=1 Card=1)
   8    1     TABLE ACCESS (BY INDEX ROWID) OF 'T1' (Cost=2 Card=1 Bytes=8)
   9    8       INDEX (RANGE SCAN) OF 'T1_I1' (NON-UNIQUE) (Cost=1 Card=1)
10    1     TABLE ACCESS (BY INDEX ROWID) OF 'T1' (Cost=2 Card=1 Bytes=8)
11   10       INDEX (RANGE SCAN) OF 'T1_I1' (NON-UNIQUE) (Cost=1 Card=1)
12    1     TABLE ACCESS (BY INDEX ROWID) OF 'T1' (Cost=2 Card=1 Bytes=8)
13   12       INDEX (RANGE SCAN) OF 'T1_I1' (NON-UNIQUE) (Cost=1 Card=1)
14    1     TABLE ACCESS (BY INDEX ROWID) OF 'T1' (Cost=2 Card=1 Bytes=8)
15   14       INDEX (RANGE SCAN) OF 'T1_I1' (NON-UNIQUE) (Cost=1 Card=1)
16    1     TABLE ACCESS (BY INDEX ROWID) OF 'T1' (Cost=2 Card=1 Bytes=8)
17   16       INDEX (RANGE SCAN) OF 'T1_I1' (NON-UNIQUE) (Cost=1 Card=1)
18    1     TABLE ACCESS (BY INDEX ROWID) OF 'T1' (Cost=2 Card=1 Bytes=8)
19   18       INDEX (RANGE SCAN) OF 'T1_I1' (NON-UNIQUE) (Cost=1 Card=1)
20    1     TABLE ACCESS (BY INDEX ROWID) OF 'T1' (Cost=2 Card=1 Bytes=8)
21   20       INDEX (RANGE SCAN) OF 'T1_I1' (NON-UNIQUE) (Cost=1 Card=1)This is the execution plan I got from 9.2.0.8, which doesn't transform to the UNION ALL, and only needs to optimise one query block.
Execution Plan
   0      SELECT STATEMENT Optimizer=ALL_ROWS (Cost=3 Card=10 Bytes=80)
   1    0   INLIST ITERATOR
   2    1     TABLE ACCESS (BY INDEX ROWID) OF 'T1' (Cost=3 Card=10 Bytes=80)
   3    2       INDEX (RANGE SCAN) OF 'T1_I1' (NON-UNIQUE) (Cost=2 Card=10)Regards
Jonathan Lewis
http://jonathanlewis.wordpress.com
http://www.jlcomp.demon.co.uk

SSL Performance Impact

Hi,
We are planning to move to SSL based communication for our web based application as well as internal communication between various components using Sockets. Are there any studies done, which tell us about the performance impact of using SSL. How much degradation in performance/throughput should we expect? Are there any guidelines available which tell us how to minimize the performance impact?
Thanks

I did some testing on that last year over a 1.5Mb Internet connection. I found that the throughput degradation for long transfers was about 1::3. The study itself was for a client, and I can't release it to the public until at least 12 months have expired.
The more important issue is the extra CPU load on the server. Beyond a certain number of connections, which depends on the hardware of course, you may want to investigate a hardware crypto accelerator.

Performance Impact - Boost in RefinmentMenu Cartridge

Hi,
Please find below the business requirement and approach used
Size facet is driven from Endeca Experience Manager using RefinementMenu cartridge, the website contains around 300 unique sizes.
We have a requirement where business user should have the flexibility to reorder the size facet values. We are achieving this using the Boost editor within the RefinementMenu cartridge.
We need information about the performance impact in using boost of RefinementMenu cartridge considering my size facet would contain around 300 sizes.

If this is an Oracle Portal question, please repost to the
appropriate Oracle Portal discussion forum.

Dynamic lists performance impact

Hi
I am interested in finding out what the performance impact of using Site Studio dynamic lists fragments on a web page are. Is the query executed each time the page is loaded? If I place more than one dynamic lists on a page how will that impact the performance?
Thx,
Vaylee

Hi Vaylee,
unless you cache your results query executes each time. I guess the impact will not be that high, as pages are processed before they are served from UCM this will add only a little to the existing process.
cheers,
sapan

Performance impact using nested tables and object

Hi,
Iam using oracle 11g.
While creating a package, iam using lot of nested tables created based on objects which will be passed between multiple functions in the package..
Will it have any performance impact since all the data is stored in the memory.
How can i measure the performance impact when the data grows ?
Regards,
Oracle User
Edited by: user9080289 on Jun 30, 2011 6:07 AM
Edited by: user9080289 on Jun 30, 2011 6:42 AM

user9080289 wrote:
While creating a package, iam using lot of nested tables created based on objects which will be passed between multiple functions in the package.. Not the best of ideas in general, in PL/SQL. This is not client code that can lay sole claim to most of the memory. It is server code and one of many server processes that need to share the available resources. So capitalism is fine on a client, but you need socialism on the server? {noformat} ;-) {noformat}
Will it have any performance impact since all the data is stored in the memory.Interestingly yes. Usually crunching data in memory is better. In this case it may not be so. The memory used is the most expensive memory Oracle can use - the PGA. Private process memory. This means each process copy running that code, will need lots of memory.
If you're not passing the data structures by reference, it means even bigger demands on memory as the data structure needs to be copied into the call stack and duplicated.
The worse case scenario is that such code consumes so much free server memory, and make such huge demands on having that in pysical memory, it trashes memory management as the swap daemons are unable to keep up with the demand of swapping virtual memory pages into and out of memory. Most CPU time is spend by the swap daemons.
I have seen servers crash due to this. I have seen a single PL/SQL process causing this.
How can i measure the performance impact when the data grows ?Well, you need to look at the impact of your code on PGA memory. It is not SQL performance or I/O performance that is a factor - just how much private process memory your code needs in order to execute.

EBS performance impact using it as a Data Source

I have a quick question on EBS performance. If I set up the EBS Database as a data source for SSRS (SQL Server Reporting Services), would there be a performance impact on EBS, due to SSRS accessing EBS Data for reports generation? Now, I know there'll always be a hit depending on the volume of data being accessed. But, my question is, will it be significantly higher using an external reporting tool using an ODBC connection rather than native XML Publisher.

I have a quick question on EBS performance. If I set up the EBS Database as a data source for SSRS (SQL Server Reporting Services), would there be a performance impact on EBS, due to SSRS accessing EBS Data for reports generation? Now, I know there'll always be a hit depending on the volume of data being accessed. But, my question is, will it be significantly higher using an external reporting tool using an ODBC connection rather than native XML Publisher.Hi,
Tough to answer without looking at data; my suggestion would be to have a test EBS environment setup, get permission from the vendors to run performance test without buying license - compare AWRs from both scenarios and then decide.
Generally speaking, native XML publisher (BI Publisher) has less of database performance hit than external reporting tools using ODBC.
Hope this helps.
Regards,

Regarding performance impact if I do DB accessing coding in comp Controller

Hi ,
This is my project requirement, I have to use some com compoment which in turn fetches data from the database. I am using a java com bridge tool to do this. This tool is generating the java proxy classes for the VB com component.
I am using java proxy classes( This class files are using JNI to connect to VB COM compnent and fetch the data from DB) in my webdynpro component controller.
The architecture is aas below
WEBDYNPRO >> JAVA Classes object( generated by the JAVA- COM bridge tool ) >> JAVA-COM bridge tool >> VB COM+ Component >> SQL server.
The issue
Performance :- first time it is OK but for Consecutive calls the application is going down very visibly and after 4 iteration it hangs . When I look at the log I am getting this
Message : Exception occured during processing of Web Dynpro application com/oreqsrch/com.oreqsrchapp.OReqSrchApp.
The causing exception is nested.
[EXCEPTION]
com.sap.tc.webdynpro.services.session.LockException: Thread SAPEngine_Application_Thread[impl:3]_36 failed to acquire exclusive lock on client session ClientSession(id=(J2EE9536400)ID1120562150DB11245826542790956137End_1159630423). Existing locks: LockingManager(ThreadName:SAPEngine_Application_Thread[impl:3]_36, exclusive client session lock:
ClientSessionLock(SAPEngine_Application_Thread[impl:3]_9), shared client session locks: ClientSessionSharedLockManager([]), app session locks: ApplicationSessionLockManager([]), current request: com/oreqsrch/com.oreqsrchapp.OReqSrchApp).
Hint: Take a thread dump of the server node to find the blocking thread that causes the problem.
Is this issue because I have return the code data access code in the component controller rather wrting in some beans ?
My questions regarding
What would the performance impact if write the DB access code in the webdynpro component controller rather than writing in a bean or an EJB?( I know ideally DB access code has to write in Bean or EJB ).
Please address this with respedct to performance point of view .
thanks
pkiran

Hi Both,
Thanks for the reply.
Yes they are closed and set it to null;
Connection max and mini properties are controlled at COM+ components in VB.
Since I am using COM - JAVA bridge, I am just invoking the methods defined ijn the VB code thru the bridge tool. all the objects which are retrieving the data are closed and nullify it.
My question is
if I write DB access code in component control instead in EJB or Java bean, will there be any performance issue ?
regards
pkiran

Will there be any performance impact

Hi All,
    Currently i'm having table employee with 1 millon records.. (emp ID is primary key). In process , i want to insert new employee ID and use for program and deleting it finally(simplyfing changes in current program).. every day this will take 100K trancations.
   I'm planning to commit only after delete. (ie insert -> make some update --> delete the same row --> commit).
Will this emp IDs added to index memory and give performance impact though i'm commiting the transaction after deleting the rows?
database : oracle 10g.
Thanks!!!

If I understand you correctly, this sounds like a use case for a global temporary table (with the same structure as your employee table).
As you insert, update and delete the same row within one single transaction (for the convenience of your code I assume), those row will only ever be visible to the session that (temporarily) inserts them into the table.
The design you are suggesting has (at least) the following performance impact:
1) it will inhibit concurrency
     - other sessions reading the table while transient rows are inserted and are being updated may have to clone some data buffers and apply UNDO to get read consistent clones of the buffers being modified.
     - you may cause buffer busy wait events as you modify the blocks belonging to your employee table while other sessions want to read the blocks affected by these modifications (the severity of this depends on how your 100K transactions are spread throughout the day and what activity runs on the database in parallel).
     - you will increase activity on the hash chain latches protecting the buffers of your employee table (the same applies to the severity as for the previous point).
2) You increase the amount of REDO generated by your code. Using a global temporary table your 100K transactions will also generate some REDO, but significantly less.
3) Using the global temporary table approach you don't need to delete the rows once you are done with your processing - you simply define your global temporary table as "ON COMMIT DELETE ROWS".
4) You'll have to do all the work associated with the index maintenance to insert and delete the corresponding index entry (see my post from Jun 24, 2013 8:16 PM)

Performance impact of Web Services

As WebLogic adds support for Web Services to its platform, what is
your plan for quantifying the performance impact and the functional
correctness of using web services before going live with the final
application.
Empirix is hosting a free one hour web event discussion on web
services testing and automated web services testing solutions on
Thursday, January 17, 2-3pm Eastern time.
To register for this web event or learn about other web events being
offering by Empirix this month, go to:
http://webevents.empirix.com
The complete abstract is below:
The advent of web services has brought the promises of integrating
multiple software applications from heterogeneous networks and for
exchanging information from vendor-to-vendor or vendor-to-consumer in
a standardized way.
As web service technologies are deployed within and across
organizations over the next several years, it will be critical that
web services undergo performance testing. As with any enterprise
software project, the adoption of proper test methodologies and use of
testing tools will play a key part in the overall success or failure
of projects utilizing web services. In a compressed software project
schedule, an organization must quickly determine if its web services
will operate successfully under a variety of load conditions. Like
other web-based technologies, successful web services will need to
respond quickly and correctly when implemented.
During our presentation, we will discuss the testing challenges
created by this emerging technology, along with the variety of testing
solutions available. Automated web service testing will be discussed
and demonstrated using FirstACT, the first web services performance
testing solution available on the market. Using a sample web service,
automatic test case creation, scalability testing, and results
analysis will be explored.

Hi,
We test several frameworks and find out that usually JAXB 2.0 performs better than XMLBeans, but that is not a strict rule.
Regards,
LG

How to use session object in jsp

hi all
marry christmas
can anyone plz tell me how to use session obect in jsp
rachna
Message was edited by:
rachna_arora82

hi rachna,
JSP has a default(implicit) session object...... use the getSession(true) method on the session object and then going u can either get or set attributes depending on the requirement
That was in general and now with the issue u have got..... what u can do is that the u can create session for every user who logs in and when he/she tries to login again then u can probably check for the existing session object in the JSP and perform the logic as required..... any clarifications plzzzzzzz let me know
Thanks n Regards
Naveen M
Message was edited by:
Novice_inJAVA
Message was edited by:
Novice_inJAVA

Performance Impact of Using Sessions

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