cx_Oracle

Follow http://mostperfect.net/blog/2010/07/28/installing-cx_oracle-on-windows/,

A looking at cx_Oracle.pyd with dependency walker (from MS) will show it depends on OCI.dll.
As a result, we need to install Oracle Instant Client from here

http://www.oracle.com/technetwork/database/features/instant-client/index-097480.html

strace

stats: strace -c -p

look for system call: strace -f -p -e epoll_wait