Dec 6, 2015 · You ask more for system metrics than Oracle. Via Oracle diagnostics instruments you can monitor sessions and their memory and temp allocations, the waits that sessions wait for, space …

Jul 22, 2016 · 12 I'm new to Oracle db. I have 2 queries which return the same result set. I want to measure the performance of each of them and choose the better one. How do I do that using Oracle …

Dec 5, 2008 · It depends which version of oracle you have, for 9i and below Statspack is what you are after, 10g and above, you want awr , both these tools will give you the top sql's and lots of other stuff.

Apr 19, 2011 · Oracle (and other databases) cache queries, which is where you see the behavior you describe. A "hard" parse means there's no query plan for the query, which leaves Oracle to figure out …

Mar 7, 2009 · My application, which uses an Oracle database, is going slow or appears to have stopped completely. How can find out which queries are most expensive, so I can investigate further?

Jan 12, 2012 · How to use Toad to trace what sql are being executed by my application? All I want to do is trace what SQL / PL/SQL procedures are being executed by my application and what parameters …

Jan 11, 2024 · In Oracle SQL Developer, I do not see Real Time SQL Monitoring, under the "Tools" menu where it should be. I am only seeing Monitor Sessions, which doesn't seem to provide that …

Apr 8, 2022 · It can't random-access an ordinary index. But Oracle has function indexes. You may be able to get better performance if you create an index like this: CREATE INDEX whatever_1 ON …

Jun 23, 2012 · In this excellent SO question, differences between CTE and sub-queries were discussed. I would like to specifically ask: In what circumstance is each of the following more efficient/faster? …

Feb 12, 2013 · An update SQL query was executed on the server, which caused many problems later. How can I get the list of update queries executed in last 2 months, so that I can trace the exact …