Scores of very small

DB 12 C

UNIX platform

Nice day

She plans to create a table with the number of lines in the future. The table is in some areas, such as DATE, NUMBER of FIELD_B, FIELD_C NUMBER FIELD_A. A pair FIELD_A and FIELD_B is unique for each row.

I have a lot of app clients those do the same actions. Each customer insert a new line, then in a short time (a few seconds to normal) and several hours in exceptional cases the customer do updates 1-3/requests on this line and work with this line is considered to be complete and the line should be deleted. Then the customer repeat the action again with the new line. Updates and queries can be on a single pair FIELD_A and FIELD_B and also the table will be interviewed every 10-20 seconds from the beach of FIELD_A.

Could give you some advice about my decision to split the table into partitions for example size very small interval of FIELD_A half minute. All major operations should be on new hot partitions every time and after all rows have been processed the partition will be deleted. If a few lines in the score are not completed the partition will be alive for awhile.

No local/global index is used at all due to the very small size of the partition.

We plan to use SSD to the table and propose any to reach 10 K GST autour.

Deletion of partitions can be made into work every day and I think that it will affect performance.

Then you 'think' bad. You need to base decisions on FACTS - not on conjecture.

Your 'opinion' is appropriate to form a hypothesis. But then you must TEST to see if it is correct or not. If you are correctly the tests you'll have is likely to find that is NOT correct.

In your schema, you probably provoquerez Oracle spend MORE time and resources, manage partitions on the treatment of real user DML operations.

If I use the standard table bunch I should create indexes which often will be rebuilt due to the vast insert/delete operations and this will cause performance will degrade.

I submit that you're wrong on these ISSUES. Index rarely need to be rebuilt. What if all I see people rebuild them when it is NOT needed. Worse, they rebuild them on a regular basis without even knowing if it's necessary.

Secondly any assertion that 'performance degrades"is NOT supported by the information that you have posted here. Do tests. Gather a few facts. And THEN after the results presented here to see and comment on.

Also in this case I should reduce the table periodically.

Why? You posted NOTHING to substantiate this claim.

For an ordinary table if you delete, then insert the same amount of data, then the space is just going to be reused. The most common reason for SHRINK after you did an ATYPICAL of a large amount of data load and now will be only loading and working with a smaller set of data.

Even for this use case, you have not posted ALL the numbers that show what the charge of volumes are supposed to be the day the day over time.

Without knowing all the requirements make you it difficult to provide specific assistance.

The best help I can offer is what I said earlier. DO NOTHING until you have actually identified a problem that must be solved.

1 identify/confirm that there REALLY is a problem

2. determine the cause of the problem

3. identify possible solutions

4. Select one or two prototype and test solutions

5. Select the BEST solution for those tested

Based SOLELY on what you posted in this thread you seem to have jumped the first four steps.

Tags: Database

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