PostgreSQL settings for running on an SSD drive

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All;

I'm working with a client running PostgreSQL on a Fusion-IO drive.

They have a PostgreSQL setup guide from Fusion recommending the following settings:
effective_io_concurrency=0
bgwriter_lru_maxpages=0
random_page_cost=0.1
sequential_page_cost=0.1


These seem odd to me, effectively turning the background writer off,
plus setting both random_page_cost and sequential_page_cost to the same (very low) value...

Thoughts?


Thanks in advance


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