Question:
How do I find slow SQL statements in my
Oracle database?
Answer: Oracle
provides several views to find SQL with a long execution time:
- v$active_session_history: The
sysdate-sql_exec_start will find slow SQL statements
- v$sql: The elapsed_time
column shows slow execution time for current SQL statements
- stats$sqlstat: This shows slow SQL
if you install
STATSPACK
- dba_hist_sqlstat : If you have
purchased the required extra cost packs, this table will collect
data on slow SQL statements over time.
Also see my notes on
finding slow
SQL statements and scripts to find SQL with a
slow
execution time.
For pre-tested scripts to find slow SQL
statements, get the
Oracle script
collection.
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