Will there be any tools avialable to the on query performance tuning
HelloHow to tune a database query?
Suppose that there are basic query "select * from emp where empid = '1101' ';"
Y at - it all avilabale tools to suggest performance Tuning on a query?
How can I resolve this application, and what is the best approach on this?
Please share your ideas and thanks.
Oracle provides tools such as SQL Trace and TKPROF. For the information on a SQL query.
But basically, you should know how oracle works. You must be aware of the different access plans and know why they are being used.
You need to know when to use an index and when not to use a.
There are many more. Best thing for you would be to start reading the document.
Tags: Database
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Newbie here.
I'm using Oracle 11.2.0.3.
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In case one is interested... it looked like the AA_SEQUENCE column in the following slider: SLIDER (Select GB_ACCESSION, AA_SEQUENCE from HUMAN_DB1. HUMAN_PROTEINS) was a CLOB field. In my second target, my column correspodoning table was VARCHAR2. One hypothesis is that BLASTP_ALIGN made a VARCHAR2-> CLOB conversion internally. I changed the table to have a CLOB column and with success against BLASTP_ALIGN 170 000 documents about 8 seconds (not much, but better than 45).
I will mark it as answered.
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