RE: Important: Oracle processes taking lots of CPU
- From: New DBA <new_dba_on_the_block@xxxxxxxxx>
- To: mwf@xxxxxxxx, sfaroult@xxxxxxxxxxxx, Tony.Adolph@xxxxxx, ORACLE-L@xxxxxxxxxxxxx
- Date: Wed, 24 Nov 2004 06:53:28 -0800 (PST)
Hi Mark,
> But I'll toss in a few bits anyway. The man page
> section on the system call
> or library reference "select" is often not loaded on
> various derivatives of
> Dennis Ricthie's operating system.
>
Man page shows the following information (extract):
NAME
select - synchronous I/O multiplexing
SYNOPSIS
#include <sys/time.h>
int select(int nfds, fd_set *readfds, fd_set
*writefds, fd_set
*errorfds, struct timeval *timeout);
void FD_CLR(int fd, fd_set *fdset);
int FD_ISSET(int fd, fd_set *fdset);
void FD_SET(int fd, fd_set *fdset);
void FD_ZERO(fd_set *fdset);
DESCRIPTION
The select() function indicates which of the
specified file
descriptors is ready for reading, ready for
writing, or has an error
condition pending. If the specified condition is
false for all of the
specified file descriptors, select() blocks, up
to the specified
timeout interval, until the specified condition
is true for at least
one of the specified file descriptors.
The select() function supports regular files,
terminal and pseudo-
terminal devices, STREAMS-based files, FIFOs and
pipes. The behaviour
of select() on file descriptors that refer to
other types of file is
unspecified.
Having little OS knowledge, not sure what it means!
Please let me know if you can figure out why the
process is calling this function almost infinitely and
what impact does it have!
Thanx
New DBA
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