Re: this is in plain text (row level locks)

>>>>> "Tom" == Tom Lane <tgl@sss.pgh.pa.us> writes:
   Tom> Sailesh Krishnamurthy <sailesh@cs.berkeley.edu> writes:   >> Why not have the traditional approach of a lock
tablein shared   >> memory, growing and shrinking as appropriate,
 
   Tom> Because we can't grow shared memory.  Whatever size we get at   Tom> startup is what we're stuck with.  (I
supposewe could try   Tom> asking the kernel for additional segments, but there's every   Tom> likelihood that that
willfail.)
 

We implemented a Shared Memory MemoryContext using OSSP libmm (used in
Apache) for TelegraphCQ. 

If you think it's useful I can submit it as a patch.

-- 
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Sailesh
http://www.cs.berkeley.edu/~sailesh