SQL Performance (MOSC)

MOSC Banner

dbms_stats.gather_system_stats

edited Feb 5, 2015 10:02AM in SQL Performance (MOSC) 3 commentsAnswered

Hi All,

We have an OLTP environment with around 1000 tables and 500 indexes. I have a question around system stats.

I understand system stats need to be gathered while there is load on the system, and I understand it does not need to be done frequently, instead possibly only once.

We have never run this in our environment and during some recent statspack reports we noticed db_scattered_read, db_sequential_read as in the top 5 timed wait events, multiple times on multiple reports.

After reading various documents we can potentially improve this by running gather_system_stats or by amending the following parameters:

Howdy, Stranger!

Log In

To view full details, sign in to My Oracle Support Community.

Register

Don't have a My Oracle Support Community account? Click here to get started.

Category Leaderboard

Top contributors this month

Instructions for posting

×

1. Select a discussion category from the picklist.


2. Enter a title that clearly identifies the subject of your question.


3. In the body, insert detailed information, including Oracle product and version.


Please abide by the Oracle Community guidelines and refrain from posting any customer or personally identifiable information (PI/CI).


Cloud / Fusion customers - Our Cloud community has moved! Please go to Cloud Customer Connect .


New to My Oracle Support Community? Visit our Welcome Center

MOSC Help Center