Re: RAC 10.2.0.3

Hello Ujang

You should look into voting disk tmeout settings for the relevant nodes and work with SAs/Storage Admins to arrive / ascertain the new values. Ideally, you should stress/load the database to determine the iops levels at which is experiences a meltdown.

Also, verify the mtu settings via tracepath and determine the packet loss / and/or transmission rate if you increase the mtu settings. Jumbo frames might be an option assuming all the intermediate hop points support those settings.

Review the hot blocks and look for concurrent jobs that could be contributing to such scenarios. If you can, stagger them, it would help. Look into any options to partition the relevant objects

-Rajeev

On Nov 15, 2007 12:11 AM, Ujang Jaenudin <ujang.jaenudin_at_gmail.com> wrote:
> all,
>
> i have 2 nodes RAC 10.2.0.3 on UX
> in 8k blocksize, what is the best MTU size to be set? should I set 8k too?
>
> I have the problem with high disk utilization, which causing node eviction,
> the FC is multipathing, so how is the good setting on misscount??
>
> about this parameter, how can help me???
> because user experiencing some locks on gcs, cache buffer chains, etc.
>
> _gc_affinity_time=0
> _gc_undo_affinity=false
> _gc_affinity_limit=100000
> _gc_affinity_minimum=1000000
>
>
> --
> regards
> ujang
> jakarta - indonesia
> http://ujang-id.blogspot.com

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