RAC is slower than non-RAC for batch job with lots of update/delete?

Hi, everyone,

After our database changed into RAC enviroment, the batch job is very slow. I am wondering whether RAC is not good for batch job. As batch job only use one session and only connect to one instance, but when update/delete data, sometime "gc current request" wait occurs as the block must be read from the other node. Without RAC, then this kind of wait will gone, so I think RAC is not good for batch job with plenty of update/delete operations. Anyone doesn't agree?

Thanks,
Qihua

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