Slow performance of fetching BLOB data over network is very slow

Dear Experts,
We are deploying a GIS application which handles with BLOB datatypes. Database Server is in RHEL and in 11gR2. The application is using asp.net 3.5 and using ODP.NET to connect with Oracle. But here is a performance chart which shows that performance is very slow when application and database server lie on different subnetwork.
Case      Login Time
Same Server(Both in 192.168.9.23)     20-25 sec
Same Subnet (DB:192.168.9.25) (App: 192.168.9.23)     60-80 sec
Different Subnet (DB:192.168.11.153) (App:192.168.9.23)     More then 5 minutes
So what is the reason behind this and how can I improve performance if I want to keep application and database in diff machine?
Thanks in advance.

Also, look into the various lob settings in ODP.NET.
I believe that by default in ODP.NET the LOB will be fetched in separate roundtrips but you can change this my messing with certain properties or using certain methods - apologies, a bit imprecise.
If you have a network issue then doing more roundtrips than you need to is just going to exacerbate the situation.
Trace the session - if it's networking or roundtrips you should see symptoms of it in a 10046 trace.

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If that's the case, then I'm feeling guilty, as it worked before I set it as a bridge.
2) Your log in information has changed due to service provider updates. Contact your provider to verify your account details
It's actually my mother who created that account; I'll ask her further.
my native language isn't English
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Well, I tried using PPPoA recently and it wasn't better. Also, the fact that the AirPort is currently the one making the PPPoE authentication seems to definitively indicate it's not PPPoA (thanks to your information that it wouldn't work in that case).
Generally, my opinion would be that things will work better if you use the modem or a modem/router to provide the connection service and run the AirPort in Bridge Mode.....rather than trying to put the modem in Bridge Mode and use the AirPort to provide the connection service.
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Wow, mine is actually way older than that! I don't think we've ever changed it since we had an Internet connection (around 1998). At this time, things were not designed to break too soon, right?
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Last edited by whipsch (2009-06-05 18:29:21)

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Slow performance of fetching BLOB data over network is very slow

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