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Full Discussion: Regarding Multi-Threading
Top Forums Programming Regarding Multi-Threading Post 78064 by mbb on Friday 15th of July 2005 05:31:03 AM
Old 07-15-2005
Some more info might help, like which database are you using? e.g. Informix, Oracle, SqlServer etc.

One thing is for sure - if you have a database table it will be quicker to load to if the table did not have any indicies. Usually it is better to drop the indicies, load, then re-create the indicies afterwards.

Other things to consider are referential integrity checks made by the database and constraint checks.

After such a large load, you may have to update statistical information on the table to allow the database optimizer to use the table in the optimal way e.g. 'update statistics for table' in Informix.

Disabling transaction logging on the table or database may increase the performance.

Also some database products have data loader applications to allow for high performance bulk loading of a database.

Ultimately, a large data file will take some time and you will always be bound by the performance of your physical devices.

Hope this helps

MBB
 

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LEARN ABOUT NETBSD

usleep

USLEEP(3)						   BSD Library Functions Manual 						 USLEEP(3)

NAME

     usleep -- suspend execution for interval of microseconds

LIBRARY

     Standard C Library (libc, -lc)

SYNOPSIS

     #include <unistd.h>

     int
     usleep(useconds_t microseconds);

DESCRIPTION

     The usleep() function suspends execution of the calling process until either the number of microseconds specified by microseconds have
     elapsed or a signal is delivered to the calling process and its action is to invoke a signal catching function or to terminate the process.
     The suspension time may be longer than requested due to the scheduling of other activity by the system.

     The microseconds argument must be less than 1,000,000.  If the value of microseconds is 0, then the call has no effect.

RETURN VALUES

     On successful completion, usleep() returns 0.  Otherwise, it returns -1 and sets errno to indicate the error.

ERRORS

     The usleep() function may fail if:

     [EINVAL]		The microseconds interval specified 1,000,000 or more microseconds.

SEE ALSO

     nanosleep(2), sleep(3)

STANDARDS

     The usleep() function conforms to X/Open Portability Guide Issue 4, Version 2 (``XPG4.2'').  It later appeared in the POSIX standard, but in
     IEEE Std 1003.1-2004 (``POSIX.1'') it was marked as legacy and the use of nanosleep(2) was recommended instead.  The IEEE Std 1003.1-2008
     (``POSIX.1'') revision removed usleep() from the specification.

HISTORY

     The usleep() function appeared in 4.3BSD.

BSD
								  April 29, 2010							       BSD
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