Weblogic.admin will have performance impact on live servers ?

Hi,
I am writing a tool to check weblogic server state as a seperate scrip, but just wants to know if I run every 4 hours this command (java weblogic.admin bla bla) on Live i.e Production servers, will it impact any weblogic server performance. as I have seen it takes some time to connect to weblogic and get the information.
I am planning to check only GETSTATE. Is tehre any way I can get the Health state also by using Weblogic.Admin?
Thanks,

hi all,
one of my customer is facing the performance issues on sql db. CPU allocated currently is 20 VCPU and it utilization shows very high.
Increasing VCPU would serve the purpose or any indexing or other best practices to be followed.
Please suggest
This topic first appeared in the Spiceworks Community

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I think most people simply use JConsole or WLST for a command line interface for getting at the information in the WLS MBeans.

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Hi All,
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Cheers,
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Hi Thalla,
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Index creation online - performance impact on database

hi,
I have oracle 11.1.0.7 database running on Linux as 3 node RAC.
I have a huge table which has more than 255 columns and is about 400GB in size which is also highly fragmented because of constant DML activities.
Questions:
1. For now i am trying to create an index Online while the business applications are running.
Will there be any performance impact on the database to create index Online on a single column of a table 'TBL' while applications are active against the same table? So basically my question will index creation on a object during DML operations on the same object have performance impact on the database? is there a major performance impact difference in the database in creating index online and not online?
2. I tried to build an index on a column which has NULL value on this same table 'TBL' which has more than 255 columns and is about 400GB in size highly fragmented and has about 140 million rows.
I requested the applications to be shutdown, but the index creation with parallel of 4 a least took more than 6 hours to complete.
We have a Pre-Prod database which has the exported and imported copy of the Prod data. So the pre-Prod is a highly de-fragmented copy of the Prod.
When i created the same index on the same column with NULL, it only took 15 minutes to complete.
Not sure why on a highly fragmented copy of Prod it took more than 6 hours compared to highly defragmented copy of Pre-Prod where the index creation took only 15 minutes.
Any thoughts would be helpful.
Thanks.
Phil.

How are you measuring the "fragmentation" of the table ?
Is the pre-prod database running single instance or RAC ?
Did you collect any workload stats (AWR / Statspack) on the pre-prod and production systems while creating (or failing to create) the index ?
Did you check whether the index creation ended up in-memory, single pass or multi pass in in the two environments ?
The commonest explanation for this type of difference is two-fold:
a) the older data needs a lot of delayed block cleanout, which results in a lot of random I/O to the undo tablespace - slowing down I/O generally
b) the newer end of the table is subject to lots of change, so needs a lot of work relating to read-consistency - which also means I/O on the undo system
-- UPDATED: but you did say that you had stopped the application so this bit wouldn't have been relevant.
On top of this, an online (re)build has to lock the table briefly at the start and end of the build, and in a busy system you can wait a long time for the locks to be acquired - and if the system has been busy while the build has been going on it can take quite a long time to apply the journal file to finish the index build.
Regards
Jonathan Lewis

Negative performance impact of index

A SELECT statement I've written references an otherwise unused VARCHAR2 column in a table that defaults to NULL, and which is set by another statement for some (not all) rows to a three-character string (like 'XYZ'). The query takes 2.5 hours to complete, but with an index added on the column, finishes in 2 to 3 minutes. I'm perfectly satisfied with this solution, but my extremely cautious colleagues (one in particular) are concerned that adding an index will negatively impact the performance of other INSERT or UPDATE statements that reference the table but not the column. I think they're being wildly overcautious, that an index on a column that can contain only 2 values will have minimal impact on other DML statements, if any. Am I right? Is there a reference I could consult to settle disputes like this?
Any opinions would be gratefully accepted.

djenkins99 wrote:
Is there a way to measure the impact of an index on inserts and updates? I could generate an explain plan, but I don't know how to translate the results of the explain plan into actual time (seconds less or more it takes a statement to execute). Even with my select statement, the explain plans taken before and after adding the index are definitely different, and the explain plan with the index shows it being used, although the total cost of the query with or without the index is minimally different.The "cost" of INDEX maintenance is not available as separate metric as far as I know.
It can be obtained indirectly.
1) CREATE TABLE BENCH(ID NUMBER);
2) INSERT INTO BENCH SELECT ID FROM MANY_ROWS_TABLE;
measure how long INSERT takes
SHUTDOWN IMMEDIATE
STARTUP
-- clears SGA of cached rows
3) TRUNCATE TABLE BENCH;
4) CREATE INDEX NDX_ID ON BENCH(ID);
5) INSERT INTO BENCH SELECT ID FROM MANY_ROWS_TABLE;
measure how long INSERT takes
the duration difference is cost to maintain the INDEX

Setting timeout in weblogic.admin command

Hello:
I run a script that checks the state of several thing in my platform. One of the commands I use in this script
is
java -cp .. weblogic.Admin localhost:7001 ..... GETSTATE
IS there anyway to set a timeout in this command for the case weblogic server is hang and doesnÂ´t answer anything. I have tried using sun properties for connect timeout and readTimeout but they havenÂ´t worked(I suppose that it is because weblogic.admin uses t3 instead http). I have thought to make the following
sleep 10|ps -efx| grep -i GETSTATE|grep -v grep|awk '{ print $2 }'|xargs kill -9 &
java -cp .. weblogic.Admin localhost:7001 ..... GETSTATE
but I donÂ´t like at all this solution
Regards,
Mario.

hi sir,
I think in weblogic 9.2 weblogic.Admin utility is deprecated but it works in 9.2. We have better option than weblogic.Admin utility nothing but WLST. If u want to start using weblogic.Admin we have command
java weblogic.Admin -url adminhost:listenport -username xxxx -password xxxx START managedservername
java weblogic.Admin -url adminhost:listenport -username xxxx -password xxxx SHUTDOWN managedservername
java weblogic.Admin -url adminhost:listenport -username xxxx -password xxxx START clustername
java weblogic.Admin -url adminhost:listenport -username xxxx -password xxxx SHUTDOWN clustername
If u want to use WLST for starting managed servers and clusters
check the follwing steps.
1. java weblogic.WLST
2. startNodeManager()
3. TAKE ANOTHER COMMAND PROMPT START ADMIN SERVER
4. TAKE ANOTHER COMMAND PROMPT
java weblogic.WLST
5. start('man1','Server') or start('man1','Server','localhost:7003')
6. start('mycluster','Cluster')
7.shutdown('man1','Server') or start('man1','Server','localhost:7003')
8.shutdown('mycluster','Cluster')
regards
abhi
Edited by: sumanth_abhi on Feb 5, 2009 8:54 PM

Queries Performance impact

Hi Team,
          We have few queries which were running good until last week; but for the past 3 days these queries were facing severe some performance issues and timeout dumps in the back-end.
For some selections it is running long and for some selection it is executing quicker and for some selection it is getting time out.
We made a complete data rebuild for the queries connected data targets (data rebuild from the source) before 3 days; after which the query performance issue faced.
No changes were made to the queries or objects for the last 2 months.
Data Flow - Query -> Multi Provider -> Infoset -> InfoCube -> DSO -> Datasource (DB Connect).
Note:
In Query we have nested aggregation to handle the result rows; but again no changes to it for the past 2 months.
We have loaded data in one single request at the InfoCube level.
          I mean some 2 million records with different plants in one single request do it have performance impact while reading data?
Can anyone please throw light on the possible cause for the performance issue?
Thanks
Regards
San

Hi San,
As you said that you completely loaded data and then only your performance issues started, can you please tell whether you are using any BIA for reporting?.
If not BIA, can you please delete the DB staticstics for those Infocubes and then create the DB statistics for the same.
Also you completely rebuild the data which means drop and reload, your PSATEMPSPACE OR your temporarrily file space   might have completely build. Ask your basis team to check the space in the tables.
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Weblogic.Admin command for stopping all Managed Servers in cluster

Hello All,
I am using Weblogic 9.2 MP3 on Linux env. I have a domain which has 16 Managed servers which are part of a cluster, I have eight Managed Servers running on one physical machine and other eight running on another physical Machine.
I know we can do all stop and all start of Managed servers from console if we have node manager setup. We do not want to have node manager setup in our env.
I am looking for a way to do that using java weblogic.Admin utility
Please let me know on how we can achieve this using weblogic.Admin utility by passing clustername argument.
Thanks
Weblogic Consultant

hi sir,
I think in weblogic 9.2 weblogic.Admin utility is deprecated but it works in 9.2. We have better option than weblogic.Admin utility nothing but WLST. If u want to start using weblogic.Admin we have command
java weblogic.Admin -url adminhost:listenport -username xxxx -password xxxx START managedservername
java weblogic.Admin -url adminhost:listenport -username xxxx -password xxxx SHUTDOWN managedservername
java weblogic.Admin -url adminhost:listenport -username xxxx -password xxxx START clustername
java weblogic.Admin -url adminhost:listenport -username xxxx -password xxxx SHUTDOWN clustername
If u want to use WLST for starting managed servers and clusters
check the follwing steps.
1. java weblogic.WLST
2. startNodeManager()
3. TAKE ANOTHER COMMAND PROMPT START ADMIN SERVER
4. TAKE ANOTHER COMMAND PROMPT
java weblogic.WLST
5. start('man1','Server') or start('man1','Server','localhost:7003')
6. start('mycluster','Cluster')
7.shutdown('man1','Server') or start('man1','Server','localhost:7003')
8.shutdown('mycluster','Cluster')
regards
abhi
Edited by: sumanth_abhi on Feb 5, 2009 8:54 PM

Weblogic.Admin command

After I ran setEnv.sh, I used Java weblogic.Admin command for THREAD_DUMP, it produced error "Exception in thread "main" java.lang.NoClassDefFoundError: weblogic/Admin
". What would be the best way to run a THREAD_DUMP, kill -3 PID or a java command?

hi sir,
I think in weblogic 9.2 weblogic.Admin utility is deprecated but it works in 9.2. We have better option than weblogic.Admin utility nothing but WLST. If u want to start using weblogic.Admin we have command
java weblogic.Admin -url adminhost:listenport -username xxxx -password xxxx START managedservername
java weblogic.Admin -url adminhost:listenport -username xxxx -password xxxx SHUTDOWN managedservername
java weblogic.Admin -url adminhost:listenport -username xxxx -password xxxx START clustername
java weblogic.Admin -url adminhost:listenport -username xxxx -password xxxx SHUTDOWN clustername
If u want to use WLST for starting managed servers and clusters
check the follwing steps.
1. java weblogic.WLST
2. startNodeManager()
3. TAKE ANOTHER COMMAND PROMPT START ADMIN SERVER
4. TAKE ANOTHER COMMAND PROMPT
java weblogic.WLST
5. start('man1','Server') or start('man1','Server','localhost:7003')
6. start('mycluster','Cluster')
7.shutdown('man1','Server') or start('man1','Server','localhost:7003')
8.shutdown('mycluster','Cluster')
regards
abhi
Edited by: sumanth_abhi on Feb 5, 2009 8:54 PM

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If we missed the live performances from SXSW, will we still be able to watch the performances after the artists have performed?

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Weblogic.Admin -type WebAppComponentRuntime doesnt have ObjectName

Hi,
I am writing a shell script to monitor the Weblogic Sessions in the Nagios monitoring tool. I have searched for a nagios sessions monitoring script and I had found one which uses the below command to get the MBean information about the Session, from which we get take the OpenSessionsCurrentCount* information and write logic accordingly.
$JAVA -cp $WL_CP weblogic.Admin -username ***** -password ***** -url **.***.***.***:8010 GET -pretty -type WebAppComponentRuntime >> /tmp/WebAppComponentRuntime
Now, the issue is that the script downloaded, needs a parameter called "*_ObjectName_*", in order to consider the respective MBean and then take the OpenSessionsCurrentCount information. But the output of the MBean for the type WebAppComponentRuntime, doesn't have a ObjectName, but only Name and other details.
=================================================================
$JAVA -cp $WL_CP weblogic.Admin -username ******* -password ******* -url **.***.***.**:8010 GET -pretty -type* WebAppComponentRuntime* >> */tmp/WebAppComponentRuntime*
# read .dat file until ObjectName: object_name is found
OBJECT_NAME_FOUND="F"
{ while read record ; do
if [ "${OBJECT_NAME_FOUND}" = "F" ]; then
let objectname_index=`echo ${record} | awk '{ print index($0,objectname) }' objectname=*_ObjectName_* 2>&1`
fi
done } < /tmp/WebAppComponentRuntime
=================================================================
Just before we can proceed out with the *_Name_* option, I just need to ensure that ObjectName and Name are one and the same.
Please do help me regarding this. Hope I am clear. Please do revert for any other clarifications.
Regards,
Andy.

I have a batch file i create that will start everything up. I don't think i've ever seen your error, but the admin server can be called using the startWeblogic up one dir from Bin, i dont know if it makes a difference but i've always used that one. Copy and paste below into a text file (update your paths and urls accordingly), rename to a .bat and you should be able to start everything at once
@echo off
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TIMEOUT 100
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TIMEOUT 15
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START "UCMserver1" C:\Oracle\Middleware\user_projects\domains\IMTST\bin\startmanagedweblogic UCM_server1 http://IMTSTipm01:7001
TIMEOUT 150
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Question: Will online backup impact database performance for DB6 V9.1

Dear All,
I would like to know will online backup impact the database performance? for eg: access will be slower if online backup is currently running. Appreciate if someone can shed some light on this as i'm new to DB6.
I know for oracle it will impact due the performance due to tablespace are locked in backup mode and this will increaes I/O load due to every block is written to redo log during backup instead of just the changes.
Hope to hear from you soon.
Cheers,
Nicholas Chang.

Hello Nicholas,
Here is some additional information on throttling utilities such as online backups:
SET UTIL_IMPACT_PRIORITY command
Changes the impact setting for a running utility. Using this command, you can:
throttle a utility that was invoked in unthrottled mode
unthrottle a throttled utility (disable throttling)
reprioritize a throttled utility (useful if running multiple simultaneous throttled utilities)
Scope
Authorization
One of the following:
sysadm
sysctrl
sysmaint
Required connection
Instance. If there is more than one partition on the local machine, the attachment should be made to the correct partition. For example, suppose there are two partitions and a LIST UTILITIES command resulted in the following output:
ID = 2
Type = BACKUP
Database Name = IWZ
Partition Number = 1
Description = online db
Start Time = 07/19/2007 17:32:09.622395
State = Executing
Invocation Type = User
Throttling:
Priority = Unthrottled
Progress Monitoring:
Estimated Percentage Complete = 10
Total Work = 97867649689 bytes
Completed Work = 10124388481 bytes The instance attachment must be made to partition 1 in order to issue a SET UTIL_IMPACT_PRIORITY command against the utility with ID 2. To do this, set DB2NODE=1 in the environment and then issue the instance attachment command.
Command syntax
>>-SET UTIL_IMPACT_PRIORITY FORutility-idTOpriority----><
Command parameters
utility-id
ID of the utility whose impact setting will be updated. IDs of running utilities can be obtained with the LIST UTILITIES command.
TO priority
Specifies an instance-level limit on the impact associated with running a utility. A value of 100 represents the highest priority and 1 represents the lowest priority. Setting priority to 0 will force a throttled utility to continue unthrottled. Setting priority to a non-zero value will force an unthrottled utility to continue in throttled mode.
Examples
The following example unthrottles the utility with ID 2.
SET UTIL_IMPACT_PRIORITY FOR 2 TO 0
The following example throttles the utility with ID 3 to priority 10. If the priority was 0 before the change then a previously unthrottled utility is now throttled. If the utility was previously throttled (priority had been set to a value greater than zero), then the utility has been reprioritized.
SET UTIL_IMPACT_PRIORITY FOR 3 TO 10
Relationship between UTIL_IMPACT_LIM and UTIL_IMPACT_PRIORITY settings
The database manager configuration parameter util_impact_lim sets the limit on the impact throttled utilities can have on the overall workload of the machine. 0-99 is a throttled percentage, 100 is no throttling.
The SET UTIL_IMPACT_PRIORITY command sets the priority that a particular utility has over the resources available to throttled utilities as defined by the util_impact_lim configuration parameter. (0 = unthrottled)
Using the backup utility as an example, if the util_impact_lim=10, all utilities can have no more than a 10% average impact upon the total workload as judged by the throttling algorithm. Using two throttled utilities as an example:
Backup with util_inpact_priority 70
Runstats with util_impact_priority 50
Both utilities combined should have no more than a 10% average impact on the total workload, and the utility with the higher priority will get more of the available workload resources. For both the backup and runstats operations, it is also possible to declare the impact priority within the command line of that utility. If you do not issue the SET UTIL_IMPACT_PRIORITY command, the utility will run unthrottled (irrespective of the setting of util_impact_lim).
To view the current priority setting for the utilities that are running, you can use the LIST UTILITIES command.
Usage notes
Throttling requires that an impact policy be defined by setting the util_impact_lim configuration parameter.
Regards,
Adam Wilson
SAP Development Support

Does mapping to JNDI for ejb-refs have a performance impact?

Does mapping to JNDI names for ejb-refs have a performance impact for
WLS6.1?
In the ejb-jar.xml deployment descriptor, you can define an ejb reference as
follows:
<ejb-ref>
<ejb-ref-name>ejb/AccountHomeRemote</ejb-ref-name>
<ejb-ref-type>Entity</ejb-ref-type>
<home>com.package structure.AccountHomeRemote</home>
<remote>com.package structure.AccountRemote</remote>

</ejb-ref>
Now, optionally, you can use the ejb-link element - or - you can, in the
weblogic DD, specify a JNDI name that the ejb-ref maps to.
Using a JNDI name buys you some flexibility. If, for some reason, the jar is
divided, you dont have to convert ejb-link's to JNDI names. The question is:
Is there a performance cost in doing this?
Cheers

Hi Aashish,
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Scenario 1. Synchronous
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2) PI does a data mapping and sends the data to ECC.
3) ECC contains an inbound interface which receives the data and in which abap proxy code is written.
4) The abap proxy code executes a function module and sends the response as an internal table back to PI.
5) PI receives the response and places it in a text/csv file and places it back to another folder.
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Scenario 2. Asynchronous
1) PI Picks file from a common folder.
2) PI does a data mapping and sends the data to ECC.
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5) PI receives the response from the second interface and places it in a text/csv file and places it back to another folder.
I would like to know which would be the better approach. Documentation/references to support your claims would be much appreciated.
Cheers,
Mz

Will there be any performance impact

Hi All,
    Currently i'm having table employee with 1 millon records.. (emp ID is primary key). In process , i want to insert new employee ID and use for program and deleting it finally(simplyfing changes in current program).. every day this will take 100K trancations.
   I'm planning to commit only after delete. (ie insert -> make some update --> delete the same row --> commit).
Will this emp IDs added to index memory and give performance impact though i'm commiting the transaction after deleting the rows?
database : oracle 10g.
Thanks!!!

If I understand you correctly, this sounds like a use case for a global temporary table (with the same structure as your employee table).
As you insert, update and delete the same row within one single transaction (for the convenience of your code I assume), those row will only ever be visible to the session that (temporarily) inserts them into the table.
The design you are suggesting has (at least) the following performance impact:
1) it will inhibit concurrency
     - other sessions reading the table while transient rows are inserted and are being updated may have to clone some data buffers and apply UNDO to get read consistent clones of the buffers being modified.
     - you may cause buffer busy wait events as you modify the blocks belonging to your employee table while other sessions want to read the blocks affected by these modifications (the severity of this depends on how your 100K transactions are spread throughout the day and what activity runs on the database in parallel).
     - you will increase activity on the hash chain latches protecting the buffers of your employee table (the same applies to the severity as for the previous point).
2) You increase the amount of REDO generated by your code. Using a global temporary table your 100K transactions will also generate some REDO, but significantly less.
3) Using the global temporary table approach you don't need to delete the rows once you are done with your processing - you simply define your global temporary table as "ON COMMIT DELETE ROWS".
4) You'll have to do all the work associated with the index maintenance to insert and delete the corresponding index entry (see my post from Jun 24, 2013 8:16 PM)

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Weblogic.admin will have performance impact on live servers ?

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