07-13-2012
Quote:
I am wondering if the speed of repositioning the disk head ...
The days of an Operating System being aware of how a disc works are long gone.
A modern disc will use variable block sizes to read/write to the disc and have it's own buffers. The Operating System will see the disc as if it is an early design, but the inner workings are invisible to the Operating System. As are the inner workings of disc arrays.
Get hold of the detailed Installation Guide for your Oracle version and your Operating System version.
Just use the kernel parameters recommended by Oracle, the Database Block Size recommended by Oracle, and the Oracle startup parameters recommended by Oracle scaled for you application and within any memory constraints. The big performance gains within Oracle Performance Tuning are in areas like Sort Buffer Size and tuning the SGA.
10 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
Im looking to get the statistics on a machine
memory, cpu speed drive size etc
thanks in advance (3 Replies)
Discussion started by: simplimarvelous
3 Replies
2. Solaris
Hi ......
I have file system problem when i try to mount get the following message :
mount: /dev/rdsk/c1t4d0s7 not a block device ....
I run fsck it's ok ,,,, after run
newfs -N /dev/dsk/c1t4d0s7 and
fsck -o b=535952 /dev/dsk/c1t4d0s7 .............it's ok ........
At the and when i try... (2 Replies)
Discussion started by: tt155
2 Replies
3. UNIX for Dummies Questions & Answers
Hi,
I am triying to make sure that there exists only one file with the pattern abc* in path /path/. This directory is having many huge files. If there is only one file then I have to take its complete name only to use furter in my script.
I am planning to do like this:
if ; then... (2 Replies)
Discussion started by: new_learner
2 Replies
4. Linux
We are intending to protect a set of user specified files using LVM mirroring where the protected space on which the user files are stored is mirrored on an LV on a different disk. Our problem is that for a user with a custom layout has installed linux with 2 partitons for swap and / and there is... (0 Replies)
Discussion started by: kickdgrass
0 Replies
5. Red Hat
Hi friends,
I wanna know how to block USB devices in my RedHat flavor Operating system.
regards,
Prakash (3 Replies)
Discussion started by: prakashkumar41
3 Replies
6. Shell Programming and Scripting
I talked with this guy who seems to think loop mounting a fs ext3 image on a directory, as opposed to just using the underlying filesystem, will work better as far as IO conflicts. I have no idea why this would be better? I haven't been able to contact him.
Basically we have a daemon that... (0 Replies)
Discussion started by: stevenswj
0 Replies
7. Linux
I use CentOS
I talked with this guy who seems to think loop mounting a fs ext3 image on a directory, as opposed to just using the underlying filesystem, will work better as far as IO conflicts. I have no idea why this would be better? I haven't been able to contact him.
Basically we have a... (1 Reply)
Discussion started by: stevenswj
1 Replies
8. Shell Programming and Scripting
Hello everyone
I am finishing a script allowing me to purge logs on multiple servers, i have one last pb with the ssh command.........it is throwing me the following error :
tcgetattr: Inappropriate ioctl for device (full screen in attached file 1, full script in attached file 2)
It... (15 Replies)
Discussion started by: jimmy75_13
15 Replies
9. UNIX for Advanced & Expert Users
Currently I am using this laborious command
lvdisplay | awk '/LV Path/ {p=$3} /LV Name/ {n=$3} /VG Name/ {v=$3} /Block device/ {d=$3; sub(".*:", "/dev/dm-", d); printf "%s\t%s\t%s\n", p, "/dev/mapper/"v"-"n, d}'
Would like to know if there is any shorter method to get this mapping of... (2 Replies)
Discussion started by: royalibrahim
2 Replies
10. OS X (Apple)
Mac Version 10.15.2 (macOS Catalina)
Does anyone know how to change the name of a connected bluetooth device from the command line on macOS?
I am having trouble with various bluetooth devices which I cannot get the "rename" option in the GUI to "save" properly and so I cannot rename a few... (0 Replies)
Discussion started by: Neo
0 Replies
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)