01-21-2011
Something to read:
http://h21007.www2.hp.com/portal/dow...rfCookBook.pdf
What hardware? What discs? Any SANs? Any NFS?
What version of Oracle?
The Oracle DBA should be able to give you detailed statistics for activity of the Oracle database engine and detailed statistics for activity of the Oracle session concerned.
It may just be reading millions of records without using an index ... or something like that. Look very closely for Oracle sorts - these are a notorious bottleneck with default Oracle SGA settings because they use disc if they have not been given enough memory.
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LEARN ABOUT PHP
oci_set_module_name
OCI_SET_MODULE_NAME(3) OCI_SET_MODULE_NAME(3)
oci_set_module_name - Sets the module name
SYNOPSIS
bool oci_set_module_name (resource $connection, string $module_name)
DESCRIPTION
Sets the module name for Oracle tracing.
The module name is registered with the database when the next 'roundtrip' from PHP to the database occurs, typically when an SQL statement
is executed.
The name can subsequently be queried from database administration views such as V$SESSION. It can be used for tracing and monitoring such
as with V$SQLAREA and DBMS_MONITOR.SERV_MOD_ACT_STAT_ENABLE.
The value may be retained across persistent connections.
PARAMETERS
o $connection
-An Oracle connection identifier, returned by oci_connect(3), oci_pconnect(3), or oci_new_connect(3).
o $module_name
- User chosen string up to 48 bytes long.
RETURN VALUES
Returns TRUE on success or FALSE on failure.
NOTES
Note
Oracle version requirement
This function is available when PHP is linked with Oracle Database libraries from version 10 g onwards.
Tip
Performance
With older versions of OCI8 or the Oracle Database, the client information can be set using the Oracle DBMS_APPLICATION_INFO pack-
age. This is less efficient than using oci_set_client_info(3).
Caution
Roundtrip Gotcha
Some but not all OCI8 functions cause roundtrips. Roundtrips to the database may not occur with queries when result caching is
enabled.
EXAMPLES
Example #1
Setting the module name
<?php
$c = oci_connect('hr', 'welcome', 'localhost/XE');
// Record the module
oci_set_module_name($c, 'Home Page');
// Code that causes a roundtrip, for example a query:
$s = oci_parse($c, 'select * from dual');
oci_execute($s);
oci_fetch_all($s, $res);
sleep(30);
?>
// While the script is running, the administrator can see the
// modules in use:
sqlplus system/welcome
SQL> select module from v$session;
SEE ALSO
oci_set_action(3), oci_set_client_info(3), oci_set_client_identifier(3).
PHP Documentation Group OCI_SET_MODULE_NAME(3)