"Curtis Faith" <[EMAIL PROTECTED]> writes:
>> "Stored in the index"?  And how will you do that portably?  

> Sorry for the lack of rigorous language. I meant that there would be one
> mutex per index stored in the header or internal data structures
> associated with each index somewhere. Probably in the same structure the
> root node reference for each btree is stored.

Hm.  A single lock that must be grabbed for operations anywhere in the
index is a concurrency bottleneck.  But maybe we could avoid that.

                        regards, tom lane

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