Problem with ESS in portal

Hello experts!
I would appreciate a little help from you.
We have configured recently ESS in our portal. The problem arised since that.
We detected that all the connections between our portal and the gateway of the backend is all concentrated in the central instance.
Let me explain you. Imagine a user logs in to the application server 1 (app1) of the portal. He makes something in ESS and we detect that the connection to the backend (erp) is not made through the application server. In fact, we appreciate that this connection goes through the central instance.
JCo connection are load balanced. The problem seems to be in another configuration.
As you can understand, as ESS gives a lot of workload to the system, and since it is being processed centrally in central instance, we're having a lot of performance issues (regarding cpu bottleneck) in central instance. The other 4 applications servers are just with a 10% CPU load.
Could you help us please so that the requests from the application servers to the backend don't have to be processed in the central instance?
regards,
Filipe Vasconcelos

Makes sure you SYSTEM object connections and JCO destinations are load balanced. That's your "links" to the backend. If that all checks, make sure your load balancer is actually set to do as you are expecting. I say this because in a past project, we had an issue like this but it was becuase the load balancer was actually sending all traffic to one server instead of dispersing the load.

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hi
My problem with ESS in "Career and Jobs" menu in the option "Appraisal Document" is not appear the appraisal documents or my my question is...
What I can customize for appear the "Appraisal Documents"?
My ESS shows the following screens:
http://img295.imageshack.us/img295/3451/appraisalportal.jpg (there is also a problem with the flash player, I marked with red rectangle)
I found looking on the internet that had to configure the Performance Management
I entered in SPRO tcode, follow these steps
http://img580.imageshack.us/img580/2598/appraisal1.jpg (Entered in "Define Templates in Performance Management")
http://img215.imageshack.us/img215/6233/appraisal2.jpg
http://img651.imageshack.us/img651/4243/appraisal3.jpg
http://img340.imageshack.us/img340/622/appraisal4.jpg
http://img52.imageshack.us/img52/1842/appraisal5.jpg (click in "End Configuration")
http://img534.imageshack.us/img534/8746/appraisal6a.jpg (Error screen part 1)
http://img4.imageshack.us/img4/1261/appraisal6b.jpg (Error screen part 2)
I hope the answers and posts, I wonder if my chosen way(configuring the Performance Managemente) is correct
thanks for posts
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thanks Chris for comments,
Now I customize the "Appraisal Document"
http://img18.imageshack.us/img18/4640/uiapraisal.jpg (Here I can see the evaluation that was done in the back-end)
but, I clicked in the hiperlink of "Appraisal Document Name", I see this error:
http://img80.imageshack.us/img80/8157/uiapraisal2.jpg (Error:Page not found or not avaible)
even before I saw another error ("There is no iView available for system "SAP_ERP_HumanResources": object "employee". For more information, contact your administrator.") in others posts(questions in sap forums) mentioned, These included the following notes
1468466 Performance Management Launchpad Configuration
1463821 Performance Management Portal Configuration
1416756 OBN Configuration in Performance Management
1408243 Configuration for object-based navigation
They recommended me in the back-end include roles in the resources:
http://img401.imageshack.us/img401/8048/uiapraisala.jpg
http://img689.imageshack.us/img689/9359/uiapraisalb.jpg
The note number 1463821(especially), I recommend the following
<a href="https://websmp230.sap-ag.de/sap(bD1lcyZjPTAwMQ==)/bc/bsp/spn/sapnotes/index2.htm?numm=1463821" target=nieves>note 1463821</a> (link note)
http://img88.imageshack.us/img88/7484/uiapraisal1.jpg (LPD_CUST tcode)
http://img266.imageshack.us/img266/7405/uiapraisal1b.jpg (Check in "Restricted Parameters" and "Active" - "EXT_HEAD")
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http://img97.imageshack.us/img97/5167/uiapraisal3a.jpg
http://img413.imageshack.us/img413/5643/uiapraisal3b.jpg
http://img534.imageshack.us/img534/4585/uiapraisal3c.jpg
http://img203.imageshack.us/img203/4605/uiapraisal3d.jpg
Finally, my main error is :Page not found or not avaible (I referred at the beginning of the post http://img80.imageshack.us/img80/8157/uiapraisal2.jpg)
Why I see this error (Page not found or not avaible)?
http://img80.imageshack.us/img80/8157/uiapraisal2.jpg (Error:Page not found or not avaible)
I hope the helps, and thaks very much.
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Iam Facing a problem in ESS career and job .
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Waiting 4 response

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Hi
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http://img517.imageshack.us/img517/4193/careerjob1.jpg
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