Dark_Ichigo,
Take a look at the configuration file precedence. It will come in handy when trying to trouble shoot why something works for one user but not another.
http://docs.splunk.com/Documentation/Splunk/5.0.2/Admin/Wheretofindtheconfigurationfiles
Local folders are basically read before the defaults. Then what is set in the local files takes priority over the defaults. Think of it as a first in wins.
Example:
local/limits.conf
[thruput]
maxKBps = 512
defualt/limits.conf
[thruput]
maxKBps = 256
Your maxKBps is going to be 512, even though default says 256. It doesn't override it per-say, it ignores it because it is already set. Overriding something, something has to be set before it can be overridden. And with the order the config files are read/loaded, local conf files are before default conf files.
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