> Huh?  Doubled compared to what?

Compared to how much data writing I can do to the database when pgsql_tmp 
isn't engaged.

In other words, when pgsql_tmp isn't being written, database writing is 9mb/s.  
When pgsql_tmp gets engaged, that drops to 4mb/s.

Alternatively, the WAL drive, which is the same hardware, will write at 


Josh Berkus
Aglio Database Solutions
San Francisco

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