EAserver - Some users have bad performance, some good

Author

Some users have bad performance, some good

Daniel Coppersmith

2005-11-11, 8:24 pm

I have an EA Server (5.1) application that hosts PowerBuilder (9) components
with JSP front end. Everything runs in a browser (IE 6).

Some users have very slow response time loading a page. Others have near
lightning speed response opening the same page at the same time.

Does anyone have any suggestions on why this might be or how to troubleshoot
it?

Could it be some kind of non-related network issue?

Any suggestions or guesses you can offer, I'd appreciate it - no matter how
far off base you think it might be...

D

Rahul Jain

2005-11-11, 8:24 pm

It looks like it is not related to server-side, but still you might want to
put a servlet filter to record the time a JSP takes to serve a page.

As for the client-side, are all the users on the same network? I was at a
client's last week and any page I opened, it took a long time. Turned out
they had a sniffer there to see which sites I was visiting and it was
blocking them. But if all your users on on same n/w, this may not be the
issue.

--
Rahul Jain

"Daniel Coppersmith" <daniel_N.0.S.P.A. M_at_InFrontSoftware
_D0T_C0M> wrote
in message news:43750a62$1@foru
ms-2-dub...
>I have an EA Server (5.1) application that hosts PowerBuilder (9)
>components
> with JSP front end. Everything runs in a browser (IE 6).
>
> Some users have very slow response time loading a page. Others have near
> lightning speed response opening the same page at the same time.
>
> Does anyone have any suggestions on why this might be or how to
> troubleshoot
> it?
>
> Could it be some kind of non-related network issue?
>
> Any suggestions or guesses you can offer, I'd appreciate it - no matter
> how
> far off base you think it might be...
>
> D
>
>

Daniel Coppersmith

2005-11-12, 3:24 am

How do I put a servlet filter on? What would it do - track and record the
requests by IP so I could verify the JSP was generated with the same amount
of time for both the "fast user" and "slow user" ?

Just so I can rule EAS out as the culprit, assuming the JSP is generated the
same for both users, could EAS be taking longer to return the HTML to one v.
the other for some reason (other than things outside it's control like
sniffers and firewalls).

They are all on the same network. Curiously, one of the "fast" users is a
VPN user and I would expect them to be slowed down. I wonder if the VPN
users might not have to go through the same hoops as an internal user?
Seems backwards though.

I don't know much about info security - do you know if info sec can put a
sniffer to monitor one persons machine (maybe they suspect them) and not
someone elses, or is that an everybody or nobody kind of thing?

Thanks for your help and ideas!

"Rahul Jain" <jainrahul@gmailXXX.com> wrote in message
news:43751aee$1@foru
ms-2-dub...
> It looks like it is not related to server-side, but still you might want
to
> put a servlet filter to record the time a JSP takes to serve a page.
>
> As for the client-side, are all the users on the same network? I was at a
> client's last week and any page I opened, it took a long time. Turned out
> they had a sniffer there to see which sites I was visiting and it was
> blocking them. But if all your users on on same n/w, this may not be the
> issue.
>
> --
> Rahul Jain
>
>
> "Daniel Coppersmith" <daniel_N.0.S.P.A. M_at_InFrontSoftware
_D0T_C0M> wrote
> in message news:43750a62$1@foru
ms-2-dub...
near[color=darkred]
>
>

Rahul Jain

2005-11-12, 8:24 pm

I can send you the servlet filter class - please email me at
rahul. jain@NOSPAMcynergysy
stems.com.

I am assuming you are using EAServer as the webserver too, right? I
currently simply log the JSP processing time out, but you can easily modify
the Java code to log out the user (or any other info) as well. Do you know
how to create a servlet filter in EAServer? It's not difficult, but it's
different in a way that you cannot simply modify the web.xml, you gotta do
it from Jaguar Manager.

I am not an expert in the security and network issues, but once you rule out
the server side of things, you can concentrate on the other pieces.

--
Rahul Jain

"Daniel Coppersmith" <daniel_N.0.S.P.A. M_at_InFrontSoftware
_D0T_C0M> wrote
in message news:43757979$1@foru
ms-2-dub...
> How do I put a servlet filter on? What would it do - track and record
> the
> requests by IP so I could verify the JSP was generated with the same
> amount
> of time for both the "fast user" and "slow user" ?
>
> Just so I can rule EAS out as the culprit, assuming the JSP is generated
> the
> same for both users, could EAS be taking longer to return the HTML to one
> v.
> the other for some reason (other than things outside it's control like
> sniffers and firewalls).
>
> They are all on the same network. Curiously, one of the "fast" users is a
> VPN user and I would expect them to be slowed down. I wonder if the VPN
> users might not have to go through the same hoops as an internal user?
> Seems backwards though.
>
> I don't know much about info security - do you know if info sec can put a
> sniffer to monitor one persons machine (maybe they suspect them) and not
> someone elses, or is that an everybody or nobody kind of thing?
>
> Thanks for your help and ideas!
>
>
> "Rahul Jain" <jainrahul@gmailXXX.com> wrote in message
> news:43751aee$1@foru
ms-2-dub...
> to
> near
>
>

Jim Egan

2005-11-14, 1:24 pm

"Daniel Coppersmith" <daniel_N.0.S.P.A. M_at_InFrontSoftware
_D0T_C0M> wrote...
> I have an EA Server (5.1) application that hosts PowerBuilder (9) components
> with JSP front end. Everything runs in a browser (IE 6).
>
> Some users have very slow response time loading a page. Others have near
> lightning speed response opening the same page at the same time.
>
> Does anyone have any suggestions on why this might be or how to troubleshoot
> it?
>
> Could it be some kind of non-related network issue?
>
> Any suggestions or guesses you can offer, I'd appreciate it - no matter how
> far off base you think it might be...

I have seen issues where one user is able to get pages served up quickly and another takes
much longer. The problem in this case the network.

I can simulate this from my development machine by going into a client site with VPN. It
will take as much as 20 seconds to get to the web site on my local network, but I can get
to a web site within the client network very quickly.

One other guess is that your components could be set to only allow one active instance at a
time. Any user coming in slightly behind another user would have to wait for the component
to become available.
--
Jim Egan [TeamSybase]
Sybase product enhancement requests:
http://www.isug.com/cgi-bin/ISUG2/submit_enhancement

Sponsored Links