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Top Forums UNIX for Advanced & Expert Users Causes of high runq-sz and cswch/s output from sar Post 302242764 by jim mcnamara on Thursday 2nd of October 2008 09:51:20 PM
Old 10-02-2008
as, cfq, deadline, and noop are the four choices, AFIAK right now


/sys/block/$devicename/queue/scheduler for each device has one of those values. Supposedly you can place another value into the "file"
Code:
echo  "noop" > /sys/block/$devicename/queue/scheduler

and thereby change the behavior of a running kernel. ..... where $devicename is the name of a block device like /dev/sda1


"elevator" is the kernel parameter used to control this at boot time.


I HAVE NEVER done this; be careful.
 

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DB2_PCLOSE(3)								 1							     DB2_PCLOSE(3)

db2_pclose - Closes a persistent database connection

SYNOPSIS
bool db2_pclose (resource $resource) DESCRIPTION
This function closes a DB2 client connection created with db2_pconnect(3) and returns the corresponding resources to the database server. Note This function is only available on i5/OS in response to i5/OS system administration requests. If you have a persistent DB2 client connection created with db2_pconnect(3), you may use this function to close the connection. To avoid substantial connection performance penalties, this function should only be used in rare cases when the persistent connection has become unresponsive or the persistent connection will not be needed for a long period of time. PARAMETERS
o $connection - Specifies an active DB2 client connection. RETURN VALUES
Returns TRUE on success or FALSE on failure. EXAMPLES
Example #1 Closing a persistent connection The following example demonstrates a successful attempt to close a connection to an IBM DB2 i5/OS database. <?php $conn = db2_pconnect('', '', ''); $rc = db2_pclose($conn); if ($rc) { echo "Connection was successfully closed."; } ?> The above example will output: Connection was successfully closed. SEE ALSO
db2_close(3), db2_pconnect(3). PHP Documentation Group DB2_PCLOSE(3)
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