10-05-2001
Hello Perderabo,
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"
I know that my method leaves a sleep process running if the timed command completes in time. I think that's harmless. It will be reaped by init when it exits. That's the only real cost of a very easily coded solution. Capturing and killing that last pid will drive script back up in complexity.
"
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Does sleep process creates any kind of overhead for the unix system.
When I execute the following command (sleep 30; echo hello) &
, it create the two processes one is the shell process and the other is sleep process and the sleep process pid is always 1 greater than the shell process pid. Is it always true ?.
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LEARN ABOUT PHP
cubrid_ping
CUBRID_PING(3) 1 CUBRID_PING(3)
cubrid_ping - Ping a server connection or reconnect if there is no connection
SYNOPSIS
bool cubrid_ping ([resource $conn_identifier])
DESCRIPTION
Checks whether or not the connection to the server is working.
PARAMETERS
o $conn_identifier
- The CUBRID connection identifier. If the connection identifier is not specified, the last connection opened by cubrid_connect(3)
is assumed.
RETURN VALUES
Returns TRUE if the connection to the server CUBRID server is working, otherwise FALSE.
EXAMPLES
Example #1
cubrid_ping(3) example
<?php
set_time_limit(0);
$conn = cubrid_connect('localhost', 33000, 'demodb');
/* Assuming this query will take a long time */
$sql = "select * from athlete";
$result = cubrid_query($sql);
if (!$result) {
echo 'Query #1 failed, exiting.';
exit;
}
/* Make sure the connection is still alive, if not, try to reconnect */
if (!cubrid_ping($conn)) {
echo 'Lost connection, exiting after query #1';
exit;
}
cubrid_free_result($result);
/* So the connection is still alive, let's run another query */
$sql2 = "select * from code";
$result2 = cubrid_query($sql2);
?>
PHP Documentation Group CUBRID_PING(3)