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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usleep(3) Library Functions Manual usleep(3)
NAME
usleep - Suspends execution for an interval of time
LIBRARY
Standard C Library (libc.so, libc.a)
SYNOPSIS
#include <unistd.h>
int usleep(
useconds_t useconds);
The following function declaration does not conform to current standards and is supported only for backward compatibility:
#include <unistd.h>
void usleep(
unsigned useconds);
STANDARDS
Interfaces documented on this reference page conform to industry standards as follows:
usleep(): XPG4-UNIX
Refer to the standards(5) reference page for more information about industry standards and associated tags.
PARAMETERS
Specifies the number of microseconds to sleep.
DESCRIPTION
The usleep() function suspends the current process from execution for the number of microseconds specified by the useconds parameter.
Because of other activity in the system, or because of the time spent in processing the call, the actual suspension time might be longer
than specified.
The useconds parameter must be less than 1,000,000. If the value of useconds is 0 (zero), the usleep() function has no effect.
In a multithreaded environment, the sleep() function is redefined to suspend the calling thread.
RETURN VALUES
On successful completion, the usleep() function returns 0 (zero). Otherwise, it returns -1 and sets errno to indicate the error.
ERRORS
The usleep() function sets errno to the specified values for the following conditions: The interval specified in the useconds parameter
exceeds 1,000,000 microseconds.
RELATED INFORMATION
Functions: getitimer(2), sigaction(2), sigvec(2), alarm(3), sleep(3)
Standards: standards(5) delim off
usleep(3)