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In 1970 , women represented just 5 % of law students and 8 % of medical school students . Timing under Linux 2.0.27 seems to have a roughly 5 % variation from run to run , presumably due to the scheduling vagaries of multitasking systems . But if we do n't get more of our young people involved in technology and engineering soon , we 'll be confronting a frightening pros-pect : our technologically advanced world will become an unmanageable tangle of high-tech gadgets more akin to the dirt roads and foot bridges of centuries ago than the information super highway we all so loudly declared just five years ago . Hence , the postmaster is always running , waiting for requests , whereas frontend and backend processes come and go . String representation is architecture-neutral whereas binary representation can differ between different machine architectures and Postgres does not resolve byte ordering or representation issues for binary cursors . As an example , if a query returns a value of one from an integer column , you would get a string of ' 1 ' with a default cursor whereas with a binary cursor you would get a 4-byte value equal to control-A ( ' ^ A ' ) . When choosing between the rewrite and instance rule systems for a particular rule application , remember that in the rewrite system , current refers to a relation and some qualifiers whereas in the instance system it refers to an instance ( tuple ) . Once you delete the source files , tar file and regression database , you will need 2 Mbytes for / usr / local / pgsql , 1 Mbyte for the empty database , plus about five times the space you would require to store your database data in a flat file . The economy now creates new career opportunities for knowledge workers at a rate five times greater than the national average . The systems can be integrated to the Internet allowing building operators to access their system from anywhere in the world 24 hours a day to view current operating conditions , see system alarms , and change set points and schedules . See pg_hba.conf ( 5 ) for a description of the authentication systems available .