UKoom » Database

SQL Server Profiler – Only TrueType fonts are supported

ukoom — Sun, 22 Aug 2010 05:12:27 +0000

Error message – “Only TrueType fonts are supported. This is not a TrueType font.” was thrown when using SQL Server Profiler.

Solution：

1. Open SQL Server Profilr

2. Go to ‘ Tool’Menu

3. Select Options

4. Change the font name to “Arial”

5. Click OK.

Get definition for view in Oracle

ukoom — Fri, 23 Apr 2010 01:19:36 +0000

set LONG 10000
select TEXT from ALL_VIEWS where view_name = ‘MY_VIEW‘;

Line one must be at least the size of the statement used to create the view. Either pick a really big number if you think the view is large or use the following to determine how long it is first. If it isn’t, the text will be truncated

select text_length from all_views where view_name = ‘MY_VIEW’

NOTE: name of the view is case sensitive as are most every thing in Oracle.

If you want to capture output to something other than a SQL Plus window such as a file, be sure to include do the following before you execute the select statement.

spool c:\v_person.sql

To close the file when you are done writing output to it, call the following:

spool off

To summarize:

select text_length from all_views where view_name = ‘MY_VIEW’

10000

– whatever value you get back, use on the next statement.

set LONG 10000

spool c:\v_person.sql

select TEXT from ALL_VIEWS where view_name = ‘MY_VIEW‘;

spool off

PowerDesigner Non SQLError

ukoom — Fri, 05 Feb 2010 05:35:56 +0000

The error “Non SQLError Could not load class Driver_name” was thrown when using PowerDesigner to generate the hibernate mapping files.

This error occurs if you enter an incorrect Driver and URL in the Database Profile.

PowerDesigner Reverse Engineer

ukoom — Fri, 05 Feb 2010 05:34:06 +0000

Get the Physical Data Model
1. Menu Operation
File, Reverse Engineer , Database, New Phycial Data Model
2. Connection
Add a connect to the target database
3. Choose tables to generate the models

Generate the Java Code
1. Menu Operation
Tools , Generate Object-Oriented Model, Detail, O/R Mapping,
Enable Transformations, Extended Model Definitions, O/R Mapping, Hibernate

To be continued.

Oracle Tuning Documentum Server

ukoom — Mon, 07 Dec 2009 06:44:56 +0000

Modifying the dmcl.ini File on the Oracle WebCenter Content Service for Documentum Host

On all computers that host the Oracle WebCenter Content Service for Documentum, you can increase the max_session_count variable in the dmcl.ini file to allow for additional concurrent sessions. By default, the max_session_count is set to 10, meaning there can be 10 concurrent sessions to Documentum.

The number of Documentum sessions depends on the number of content crawlers you expect to run concurrently, as well as the number of users you expect to click through links concurrently. We recommend you set the max_session_count parameter accordingly. You can increase this setting later if you find that you run out of sessions or want to increase the number of content crawlers running simultaneously.
A session is started for each user with a unique user name/password that tries to click through to a Documentum document in the portal. The max_session_count must accommodate the estimated number of click through users to be handled concurrently.

Modifying the server.ini File on the Documentum Server

On the Documentum Server computer, you can change the settings in the server.ini file to allow for additional concurrent sessions.

The concurrent_sessions variable controls the number of connections the Documentum server can handle concurrently. This parameter should accommodate for the sum of all the max_session_count values in your environment.

If you plan to use the Oracle WebCenter Content Service for Documentum with several different docbases, you must modify the server.ini for each docbase. When making these configuration changes, consider the following:

As with any configuration changes, take into account any hardware limitations.
The configuration settings depend on both existing and projected Documentum usage.

Oracle Session Statistics

ukoom — Mon, 07 Dec 2009 05:55:32 +0000

Here are some scripts related to Session Statistics .

Session I/O By User

SESSION I/O BY USER NOTES:

Username – Name of the Oracle process user

OS User – Name of the operating system user

PID – Process ID of the session

SID – Session ID of the session

Serial# – Serial# of the session

Physical Reads – Physical reads for the session

Block Gets – Block gets for the session

Consistent Gets – Consistent gets for the session

Block Changes – Block changes for the session

Consistent Changes – Consistent changes for the session

select	nvl(ses.USERNAME,'ORACLE PROC') username,
	OSUSER os_user,
	PROCESS pid,
	ses.SID sid,
	SERIAL#,
	PHYSICAL_READS,
	BLOCK_GETS,
	CONSISTENT_GETS,
	BLOCK_CHANGES,
	CONSISTENT_CHANGES
from	v$session ses,
	v$sess_io sio
where 	ses.SID = sio.SID
order 	by PHYSICAL_READS, ses.USERNAME

CPU Usage By Session

CPU USAGE BY SESSION NOTES:

Username – Name of the user

SID – Session id

CPU Usage – CPU centiseconds used by this session (divide by 100 to get real CPU seconds)

select 	nvl(ss.USERNAME,'ORACLE PROC') username,
	se.SID,
	VALUE cpu_usage
from 	v$session ss,
	v$sesstat se,
	v$statname sn
where  	se.STATISTIC# = sn.STATISTIC#
and  	NAME like '%CPU used by this session%'
and  	se.SID = ss.SID
order  	by VALUE desc

Resource Usage By User

RESOURCE USAGE BY USER NOTES:

SID – Session ID

Username – Name of the user

Statistic – Name of the statistic

Value – Current value

select 	ses.SID,
	nvl(ses.USERNAME,'ORACLE PROC') username,
	sn.NAME statistic,
	sest.VALUE
from 	v$session ses,
	v$statname sn,
	v$sesstat sest
where 	ses.SID = sest.SID
and 	sn.STATISTIC# = sest.STATISTIC#
and 	sest.VALUE is not null
and 	sest.VALUE != 0
order 	by ses.USERNAME, ses.SID, sn.NAME

Session Stats By Session

SESSION STAT NOTES:

Username – Name of the user

SID – Session ID

Statistic – Name of the statistic

Usage – Usage according to Oracle

select  nvl(ss.USERNAME,'ORACLE PROC') username,
	se.SID,
	sn.NAME stastic,
	VALUE usage
from 	v$session ss,
	v$sesstat se,
	v$statname sn
where  	se.STATISTIC# = sn.STATISTIC#
and  	se.SID = ss.SID
and	se.VALUE > 0
order  	by sn.NAME, se.SID, se.VALUE desc

Cursor Usage By Session

CURSOR USAGE BY SESSION NOTES:

Username – Name of the user

Recursive Calls – Total number of recursive calls

Opened Cursors – Total number of opened cursors

Current Cursors – Number of cursor currently in use

select 	user_process username,
	"Recursive Calls",
	"Opened Cursors",
	"Current Cursors"
from  (
	select 	nvl(ss.USERNAME,'ORACLE PROC')||'('||se.sid||') ' user_process,
			sum(decode(NAME,'recursive calls',value)) "Recursive Calls",
			sum(decode(NAME,'opened cursors cumulative',value)) "Opened Cursors",
			sum(decode(NAME,'opened cursors current',value)) "Current Cursors"
	from 	v$session ss,
		v$sesstat se,
		v$statname sn
	where 	se.STATISTIC# = sn.STATISTIC#
	and 	(NAME  like '%opened cursors current%'
	or 	 NAME  like '%recursive calls%'
	or 	 NAME  like '%opened cursors cumulative%')
	and 	se.SID = ss.SID
	and 	ss.USERNAME is not null
	group 	by nvl(ss.USERNAME,'ORACLE PROC')||'('||se.SID||') '
)
orasnap_user_cursors
order 	by USER_PROCESS,"Recursive Calls"

User Hit Ratios

USER HIT RATIO NOTES:

Username – Name of the user

Consistent Gets – The number of accesses made to the block buffer to retrieve data in a consistent mode.

DB Blk Gets – The number of blocks accessed via single block gets (i.e. not through the consistent get mechanism).

Physical Reads – The cumulative number of blocks read from disk.

Logical reads are the sum of consistent gets and db block gets.

The db block gets statistic value is incremented when a block is read for update and when segment header blocks are accessed.

Hit ratio should be > 90%

select	USERNAME,
	CONSISTENT_GETS,
        BLOCK_GETS,
        PHYSICAL_READS,
        ((CONSISTENT_GETS+BLOCK_GETS-PHYSICAL_READS) / (CONSISTENT_GETS+BLOCK_GETS)) Ratio
from 	v$session, v$sess_io
where 	v$session.SID = v$sess_io.SID
and 	(CONSISTENT_GETS+BLOCK_GETS) > 0
and 	USERNAME is not null
order	by ((CONSISTENT_GETS+BLOCK_GETS-PHYSICAL_READS) / (CONSISTENT_GETS+BLOCK_GETS))

Link to Oracle Database

ukoom — Wed, 18 Nov 2009 05:01:07 +0000

sqlplus user/pass@//IP:PORT/service

SQL SELECT TOP N

ukoom — Fri, 13 Nov 2009 16:03:03 +0000

SQL Server:

SELECT TOP 10 product, descr, email
FROM products

ORACLE:

SELECT product, descr, email
FROM products
WHERE ROWNUM <= 10

MySQL:

SELECT product, descr, email
FROM products
LIMIT 10

ORA-00942: Table or view does not exist

ukoom — Fri, 13 Nov 2009 13:21:35 +0000

The table you are trying to access does not exists, or you do not have privileges to access the table.

You can use following select to determine if you have access on the table:

select owner, object_name, object_type from all_objects where object_name=' or '

If you do see the table/view in the previous select, you might need to add the owner in front of the table/view name.

select * from owner.object_name

If you have to add the owner in front of the name, you can consider creating a synonym.

create synonym synonym_name for owner.object_name.

From now on you can just select from the synonym name (which is usually the same name as the table/view name).

If you do not have privileges on the table or view, grant the necessary privileges as the owner of the object:

grant select on object name to privileged user Please refer to http://www.dbmotive.com/oracle_error_codes.php?errcode=00942

DROP MATERIALIZED VIEW

ukoom — Fri, 27 Mar 2009 00:32:16 +0000

When you drop a materialized view, Oracle Database does not place it in the recycle bin. Therefore, you cannot subsequently either purge or undrop the materialized view.

The keyword SNAPSHOT is supported in place of MATERIALIZED VIEW for backward compatibility.

Prerequisites

The materialized view must be in your own schema or you must have the DROP ANY MATERIALIZED VIEW system privilege. You must also have the privileges to drop the internal table, views, and index that the database uses to maintain the materialized view data.