Using VB application, how can one see pl/sql dbms_output output?

Hi guys,
Someone wrote a pl/sql procedure, using dbms_output to debug, now we promoted them to PROD, these dbms_output statements are still there in the code.
Q1. is there any performance issue, having these statements still in code, while they are there in PROD.
Q2. these procedures have been called by VB application in PROD, now what we are looking for, is there any way to capture those errors which may be raised, there in PROD, if some weird work done by this VB application, what we
are looking for is to see those errors or whatever be the output of those dbms_output.
Do inform, is there any possibility to see those output using this VB application, coming out by dbms_output.
Please ask for clarification, if need be.
Thanks.

user8604530 wrote:
Q1. is there any performance issue, having these statements still in code, while they are there in PROD.
1) I don't think there will be a big performance issue, i.e. it won't consume noticeable cpu resources.
2) It might cause more memory consumption of your database sesssions, as all output is temporarily buffered in memory at the database server side.
1 + 2 heavily depend on how many times the dbms_output.put(_line) procedures are actually called.
3) It might cause failure of your application, as at some point in time the buffer for storing the output temporarily will fill up. And from that point onwards, all put(_line) calls will result in an error.
Q2. these procedures have been called by VB application in PROD, now what we are looking for, is there any way to capture those errors which may be raised, there in PROD, if some weird work done by this VB application, what we
are looking for is to see those errors or whatever be the output of those dbms_output.
Do inform, is there any possibility to see those output using this VB application, coming out by dbms_output.
No. Not without you doing some effort at the VB side. dbms_output data is buffered at the server side, and you will have to retrieve its contents yourself. SQLplus (and dome other adhoc sql tooling) will do this automatically for you. But I bet your VB application doesn't. Read up on the dbms_output.get(_lines) procedures on how to retrieve the contents of the buffered output.
Toon

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-- (c) Kyle Hailey 2007
col type for a10
select * from (
select
ash.SQL_ID , ash.SQL_PLAN_HASH_VALUE Plan_hash, aud.name type,
sum(decode(ash.session_state,'ON CPU',1,0)) "CPU",
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sum(decode(ash.session_state,'ON CPU',1,1)) "TOTAL"
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SELECT NVL(MIN(ID),0) FROM TABLE_OBFUSCATED WHERE TASK = :B1 AND
STATUS='JobQueue' AND MESSAGE_ID IS NULL
Plan hash value: 3831248992
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | | | 3231 (100)| |
| 1 | SORT AGGREGATE | | 1 | 42 | | |
|* 2 | TABLE ACCESS FULL| TABLE_OBFUSCATED | 3 | 126 | 3231 (1)| 00:00:39 |
Predicate Information (identified by operation id):
2 - filter(("TASK"=:B1 AND "STATUS"='JobQueue' AND "MESSAGE_ID" IS NULL))
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2. Does the SQL I show above accuratlely display current average CPU over x minutes with ASH? Why is it so low for the top consumer but my CPU is still at 100% on the OS?
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Using VB application, how can one see pl/sql dbms_output output?

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