What is the best strategy to tune database?

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What is the best strategy to tune database?

Refining your approach to database performance tuning

  1. Keep statistics up to date.
  2. Don’t use leading wildcards.
  3. Avoid SELECT *
  4. Use constraints.
  5. Look at the actual execution plan, not the estimated plan.
  6. Adjust queries by making one small change at a time.
  7. Adjust indexes to reduce I/O.
  8. Analyze query plans.

How can I improve my Oracle performance?

3.1. 1 Steps in The Oracle Performance Improvement Method

  1. Get candid feedback from users.
  2. Get a full set of operating system, database, and application statistics from the system when the performance is both good and bad.
  3. Sanity-check the operating systems of all systems involved with user performance.
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How do you make SQL queries more efficient?

12 Tips to Write Efficient SQL Queries

  1. Create Small Batches of Data for Deletion and Updation.
  2. Use CASE instead of UPDATE.
  3. Use Temp Tables.
  4. Avoid Using Another Developer’s Code.
  5. Avoid Negative Searches.
  6. Use The Exact Number of Columns.
  7. No Need to Count Everything in the Table.
  8. Avoid Using Globally Unique Identifiers.

Why does Oracle query take so long?

On a large table this could take a long time either way, maybe even longer than the 4 or 5 minutes you’re seeing. Once the data is retrieved, the temporary index would be dropped in the background. When you do another query, Oracle needs to build a new temporary index, which is why it takes that long for every query.

How can I make Oracle SQL Developer run faster?

Oracle SQL Developer: Make it Run Faster!

  1. Disable Extensions: Versions 1 – 3.2.
  2. Disable Feature: Versions 4.0 and Higher.
  3. The Results.
  4. Further Optimize Your SQL Developer Experience.
  5. Set Look and Feel Preference to Host OS.
  6. Close Grids and Files When You’re Done with Them.
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How do you optimize a database query?

It’s vital you optimize your queries for minimum impact on database performance.

  1. Define business requirements first.
  2. SELECT fields instead of using SELECT *
  3. Avoid SELECT DISTINCT.
  4. Create joins with INNER JOIN (not WHERE)
  5. Use WHERE instead of HAVING to define filters.
  6. Use wildcards at the end of a phrase only.

What are the performance tuning enhancements in Oracle 10g?

Oracle 10g includes many performance tuning enhancements including: Oracle 10g includes several features related to automatic performance diagnostics and tuning. Automatic Optimizer Statistics Collection – The name says it all.

What’s new in Oracle 10g?

Oracle 10g includes several features related to automatic performance diagnostics and tuning. Automatic Optimizer Statistics Collection – The name says it all. Automatic Workload Repository (AWR) – An extended version of the STATSPACK repository that is the heart of all the new diagnostics and tuning features.

How to gather Optimizer statistics in Oracle 10g?

By default Oracle 10g automatically gathers optimizer statistics using a scheduled job called GATHER_STATS_JOB. By default this job runs within a maintenance windows between 10 P.M. to 6 A.M. week nights and all day on weekends.

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How do I use the SQL tuning advisor?

The first step when using the SQL tuning advisor is to create a new tuning task using the CREATE_TUNING_TASK function. The statements to be analyzed can be retrieved from the Automatic Workload Repository (AWR), the cursor cache, a SQL tuning set or specified manually.