RE: 10046 trace - weird library misses

From: <Jared.Still_at_radisys.com>
Date: Thu, 13 Feb 2003 09:59:25 -0800
Message-ID: <F001.0054C475.20030213095925@fatcity.com>

Raj, where is it documented that EXEC IMMEDIATE always does a hard parse?

Thanks,

Jared

"Jamadagni, Rajendra" <Rajendra.Jamadagni_at_espn.com> Sent by: root_at_fatcity.com
 02/13/2003 07:44 AM
 Please respond to ORACLE-L  

        To:     Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com>
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        Subject:        RE: 10046 trace - weird  library misses

Are you using dynamic sql? execute immediate? That might explain ... because exec immediate does a hard parse ... and it is documented too. Raj

---

Rajendra Jamadagni MIS, ESPN Inc. Rajendra dot Jamadagni at ESPN dot com
Any opinion expressed here is personal and doesn't reflect that of ESPN Inc.
QOTD: Any clod can have facts, but having an opinion is an art!

-----Original Message-----
Sent: Thursday, February 13, 2003 9:49 AM To: Multiple recipients of list ORACLE-L

Dear friends,
I traced one of our test cases and found something weird. Did anybody else observe this?
Env:
server - 9.0.1.4, Solaris.
client - weblogic 7, uses original oracle thin 9.0.1 jdbc driver to connect.

         In fact, I can reproduce all this from SQLPlus Here is an excerpt from tkprof below - why every parse is a hard parse? Looks like the problem doesn't appear when 10046 is not set, and it appers ONLY on pl/sql blocks returning data to client, normal selects OK. Looks like bug again. Any workaround?
And what are these "Misses in library cache during execute"? 9.2.0.2 on Linux works fine, i.e. no misses once it has been parsed.

   BEGIN :1 := FN_GET_STATUS_ID(:2,:3); END;    call count cpu elapsed disk query current rows

• ------ -------- ---------- ---------- ---------- ----------

  ---

  Parse 40 0.07 0.08 0 0 0 0 Execute 80 0.62 1.55 64 1492 0 80 Fetch 0 0.00 0.00 0 0 0 0
• ------ -------- ---------- ---------- ---------- ----------

  ---

  total 120 0.69 1.63 64 1492 0 80 Misses in library cache during parse: 40 Misses in library cache during execute: 40 Optimizer goal: CHOOSE Parsing user id: 40 This select select LOADED_VERSIONS, EXECUTIONS, LOADS,PARSE_CALLS, parsing_user_id from v$sql where sql_text like 'BEGIN :1 := FN_GET_STATUS_ID(:2,:3); END;'; gives out whole bunch of these record groups LOADED_VERSIONS EXECUTIONS LOADS PARSE_CALLS PARSING_USER_ID
  • ---------- ---------- ----------- --------------- 1 1 1 1 40 1 1 1 0 40 .... repeated N times Thank you for you time Vadim G
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