Question about building wireshark and runtime options

Hi,

Have two questions require your advise

Question1: Trying to build wireshark in SLES11 Linux (SP3). Having issues where my old build directory (wireshark1) is used for plugins and selected in the "Global Configuration Folder". I am using the "--prefix" option to select a desired destination directory, but no luck. Below is the commands I used

./configure --prefix=/opt/wireshark2 --with-ssl=/usr/local/ssl --with-lua --enable-setuid-install --with-gtk=2 --without-qt --with-extcap=no --enable-warnings-as-errors=no

make -j 8

make install

Question2: I am running the wireshark application on a HP DL380 G8 server with capture interface 10Gig fiber. Would like to know the best possible settings/switches so that I get optimum real time capture performance. I use wireshark GTK to open and run traces in realtime