About Top session in a DB

Hi,all,
I need to decide what is top session in a DB, to see how much it would consume resource in that server. When I use TOAD to do it, I find these are so many factors when I make dicision. such as "CPU used by","Physical write" ...
That means "It is top session sort by CPU used by". So I want to know those essential factors, by which certain session would consume much resource.
Do you have any advice? Are there any scripts on hand to do this job,except third-part tool like TOAD?
Robin

However when I want to work with the top sessions I use the Performance Manager ( This is part of OEM ). These are its advices and descriptions.
Top SessionsSessions are displayed in descending order based upon the delta value of the statistic chosen as the sort statistic. This is a customizable chart that allows sorting and filtering of sessions based upon a number of user settable criterion.Typically the session that is performing the most I/O is the session that should be targetted for tuning. To identify the SQL statement the session is currently executing you can drill down to the Current SQL Chart. From this drilldown you can choose to tune the SQL statement directly.Complete detailed information about any session can be found by selecting the session and drilling down to the Session Details Chart. This chart allows you to view the current SQL statement as well as resource consumption and performance metrics at the same time.The list of all cursors the session has currently open is available through the Open Cursors For This Session Chart. This helps identify all the SQL statements the session is using. From this chart SQL statements can be selected for tuning further drilldown and analysis.This chart can be used to create a customized Top Sessions view. All of the available statistics and identifiers for sessions are shown in a large table by default. By using the Set Options button in the toolbar the chart can be customized to show only the items of interest and the sort criteria can be changed. Customized charts can then be saved, named and accessed directly by name. Specific advice for each of the data items shown on this chart is available below.This chart includes the following data items:
Session NameDescription This data item represents either the Oracle username of the current session or, if the session is owned by an Oracle background process, the name of the background process. Data Source select NVL(s.username, b.name) from v$session s, v$bgprocess b User Action The session name is useful in determining which database users are consuming the most resources. If there is a need to prevent a particular session from consuming too much, one way to control resource usage is to create a resource profile. This profile can then be applied to the Oracle user specified in the session name. The profile provides hard limits on any resource that is explicitly added to it. Some of the resources that can be controlled with profiles are cpu usage, idle time, connect time, etc.
OS UsernameDescription This data item represents the name of the operating system client user. That is the username reported at the time of the database connection time from the operating system. Data Source select osuser from v$session User Action The operating system username can be useful if more than one OS user shares a particular Oracle account (such as SYSTEM). If the session name is not unique, the OS username may provide the identity of the user for the session.
and so on...
Do you have OEM ?
Joel Pérez

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Top sessions from sql

hi
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with regards
ramya

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Top Session / SQL in OEM 10g

friends,
In oracle 10g enterprise manager, i can find top 10 sessions and sql information in graphical view. Can you provide me sql command for this this graphical view?
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regards
Irfan Ahmad

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Buildfile: build.xml
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check-oracle-home:
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check-oracle-home:
check-j2ee-home:
init:
wsa:
[java] java.util.zip.ZipException: The system cannot find the file specified
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Thanks

I tried to follow the Oracle "RPC literal top-down web services how-to" to develop a web service with a top-down approach but I have error when I try to compile with Ant the provided example.
This howto is located at: http://www.oracle.com/technology/sample_code/tech/java/codesnippet/webservices/rpc-lit/index.html
The error I have is:
D:\Franck\WebServices\prototype\projectAS10g\exemple\rpc-lit>ant
Buildfile: build.xml
env-check:
check-oracle-home:
check-j2ee-home:
init:
sub-init:
gen-service:
[echo] Generating service artifacts
env-check:
check-oracle-home:
check-j2ee-home:
init:
wsa:
[java] java.util.zip.ZipException: The system cannot find the file specified
[java] at java.util.zip.ZipFile.open(Native Method)
[java] at java.util.zip.ZipFile.<init>(ZipFile.java:112)
[java] at java.util.jar.JarFile.<init>(JarFile.java:127)
[java] at java.util.jar.JarFile.<init>(JarFile.java:65)
[java] Exception in thread "main"
BUILD FAILED
D:\Franck\WebServices\prototype\projectAS10g\exemple\rpc-lit\build.xml:21: The following error occurred while executing this line:
D:\Franck\WebServices\prototype\projectAS10g\exemple\rpc-lit\config\common.xml:63: Java returned: 1
Total time: 1 second
When I look at the common.xml file which is used by the build.xml one I have a class like:
<pathelement location="${ws.lib.dir}/orasaaj.jar"/>
The problem is that I do not have this jar file on my disk and I can't find it on the net. Maybe it is one of the root cause of my build failed.
Does anyone experience this howto successfully and if someone can tell me where to find this jar file it would be great.
Thanks

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-- David

Justin, I do not have a sql_id in my v$session or v$sql. This is for 10g and above. I am running 9.2.0.8.
SQL> desc v$session
Name                                      Null?    Type
SADDR                                              RAW(8)
SID                                                NUMBER
SERIAL#                                            NUMBER
AUDSID                                             NUMBER
PADDR                                              RAW(8)
USER#                                              NUMBER
USERNAME                                           VARCHAR2(30)
COMMAND                                            NUMBER
OWNERID                                            NUMBER
TADDR                                              VARCHAR2(16)
LOCKWAIT                                           VARCHAR2(16)
STATUS                                             VARCHAR2(8)
SERVER                                             VARCHAR2(9)
SCHEMA#                                            NUMBER
SCHEMANAME                                         VARCHAR2(30)
OSUSER                                             VARCHAR2(30)
PROCESS                                            VARCHAR2(12)
MACHINE                                            VARCHAR2(64)
TERMINAL                                           VARCHAR2(30)
PROGRAM                                            VARCHAR2(48)
TYPE                                               VARCHAR2(10)
SQL_ADDRESS                                        RAW(8)
SQL_HASH_VALUE                                     NUMBER
PREV_SQL_ADDR                                      RAW(8)
PREV_HASH_VALUE                                    NUMBER
MODULE                                             VARCHAR2(48)
MODULE_HASH                                        NUMBER
ACTION                                             VARCHAR2(32)
ACTION_HASH                                        NUMBER
CLIENT_INFO                                        VARCHAR2(64)
FIXED_TABLE_SEQUENCE                               NUMBER
ROW_WAIT_OBJ#                                      NUMBER
ROW_WAIT_FILE#                                     NUMBER
ROW_WAIT_BLOCK#                                    NUMBER
ROW_WAIT_ROW#                                      NUMBER
LOGON_TIME                                         DATE
LAST_CALL_ET                                       NUMBER
PDML_ENABLED                                       VARCHAR2(3)
FAILOVER_TYPE                                      VARCHAR2(13)
FAILOVER_METHOD                                    VARCHAR2(10)
FAILED_OVER                                        VARCHAR2(3)
RESOURCE_CONSUMER_GROUP                            VARCHAR2(32)
PDML_STATUS                                        VARCHAR2(8)
PDDL_STATUS                                        VARCHAR2(8)
PQ_STATUS                                          VARCHAR2(8)
CURRENT_QUEUE_DURATION                             NUMBER
CLIENT_IDENTIFIER                                  VARCHAR2(64)
SQL> desc v$sql
Name                                      Null?    Type
SQL_TEXT                                           VARCHAR2(1000)
SHARABLE_MEM                                       NUMBER
PERSISTENT_MEM                                     NUMBER
RUNTIME_MEM                                        NUMBER
SORTS                                              NUMBER
LOADED_VERSIONS                                    NUMBER
OPEN_VERSIONS                                      NUMBER
USERS_OPENING                                      NUMBER
FETCHES                                            NUMBER
EXECUTIONS                                         NUMBER
USERS_EXECUTING                                    NUMBER
LOADS                                              NUMBER
FIRST_LOAD_TIME                                    VARCHAR2(19)
INVALIDATIONS                                      NUMBER
PARSE_CALLS                                        NUMBER
DISK_READS                                         NUMBER
BUFFER_GETS                                        NUMBER
ROWS_PROCESSED                                     NUMBER
COMMAND_TYPE                                       NUMBER
OPTIMIZER_MODE                                     VARCHAR2(10)
OPTIMIZER_COST                                     NUMBER
PARSING_USER_ID                                    NUMBER
PARSING_SCHEMA_ID                                  NUMBER
KEPT_VERSIONS                                      NUMBER
ADDRESS                                            RAW(8)
TYPE_CHK_HEAP                                      RAW(8)
HASH_VALUE                                         NUMBER
PLAN_HASH_VALUE                                    NUMBER
CHILD_NUMBER                                       NUMBER
MODULE                                             VARCHAR2(64)
MODULE_HASH                                        NUMBER
ACTION                                             VARCHAR2(64)
ACTION_HASH                                        NUMBER
SERIALIZABLE_ABORTS                                NUMBER
OUTLINE_CATEGORY                                   VARCHAR2(64)
CPU_TIME                                           NUMBER
ELAPSED_TIME                                       NUMBER
OUTLINE_SID                                        NUMBER
CHILD_ADDRESS                                      RAW(8)
SQLTYPE                                            NUMBER
REMOTE                                             VARCHAR2(1)
OBJECT_STATUS                                      VARCHAR2(19)
LITERAL_HASH_VALUE                                 NUMBER
LAST_LOAD_TIME                                     VARCHAR2(19)
IS_OBSOLETE                                        VARCHAR2(1)
CHILD_LATCH                                        NUMBEREdited by: JesusLuvR on Jan 30, 2009 1:49 PM

Quick question about PHP sessions and Air app

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About Top session in a DB

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