SELECT the view queries do not run unless the shared_pool hot flashes

Hello

Need some urgent advice

We have a system that we are trying to run a simple select statement on a view (nested).

in a first time - it gives a result in less than a second. After that, it takes an hour.

Flushing the shared_pool, she will run again in less then a second... and then again an hour.

flushes of heat if the shared_pool will solve it for a single run.

I have already increased the shared_pool and it did not help... linux db system is 11.2.0.3.

parameters:

SGA_MAX_SIZE 6509559808

shared_pool_size 2147483648

pga_aggregate_target 1887436800

Thank you

ORI

You could get an execution plan different for various reasons. Maybe the comments of cardinality: you might try setting _optimizer_use_feedback = false.

Tags: Database

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