SQL*Net message from client

A client asked about why it takes 14.96 seconds for below sql(1):

SQL>select * from dba_tables;
Elapsed: 00:00:14.96

While it takes only 0.59 second for this sql(2):

SQL>select count(*) from dba_tables;
Elapsed: 00:00:00.59

Let’s compare the tkprof summary from sql tracing for those two sqls:

Subscribe to get access

Read more of this content when you subscribe today.

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google photo

You are commenting using your Google account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.