Progress Database Performance issue?

We have recently upgraded to OE 11.3 version.The application and database appears to be slow in one particular location.But we didn't face any performance issues in the application or in the databases.i have checked few parameters in promon like buffer hits,Number of databse buffers,-spin parameter.

Buffer hits -97%

number of databse buffers - 50000

-spin berfore timeout- 2000 which looks very low.

is there any way we can find the issue why the database and application is very slow in only that location?
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we are not facing any performance issue form other locations.

does increasing the -spin value would increase the performance in that location?

Location refers to geographical location.
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