Switching frequency of newspaper is very high

Oracle 10g
Sun Solaris

I came across a situation where the newspaper switching frequency becomes very high for a couple of daily hours and then returns to normal.

The increase in frequency occurs for about 6 to 8 hours daily. Then he is back to normal.


It's a situation where we have to change the size of the recovery log?

newlg1 wrote:
Define 'normal '. Set 'top '.

Just in the last hour, the log file switch happened on average 5 minutes.

Not bad. For me the 'high' is a minute or less. For me 'normal' is 15-30 minutes.

I tend to change the size of the usual load will cause a switch just about 15 minutes. Then, I'll use ARCHIVE_LAG_TARGET to keep roughly 30 minutes for no charge. You might have other values.

There is also a checkpoint not complete messages in the alert log, but it was on
On 18 April. I don't see that today.

If the checkpoint is not complete is a regular show, try adding several groups of newspapers.

However, both the size of the log and journal County should not be affected if you do not actually experience a problem. Still, what you describe is a symptom, not a problem in itself.

>

It is a RAC database. This log switch occurs in only one instance. But not the other.

This is because the only case to charge more than others.

If the load must be balanced, check your listeners and your TNS customer configurations. It is not uncommon set lots of hit one and a single node, which can be tuned. Yet once, controlled by network settings.

Note that sizes of newspapers do not need to match each instance. Sizes are set according to the load expected on each node.

Tags: Database

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