On Sat, Aug 20, 2011 at 4:57 AM, Gokulakannan Somasundaram
<gokul...@gmail.com> wrote:
> by your argument, if WALInserLock is held for 't' seconds, you should
> definitely be holding visibility map lock for more than time frame 't'.

Nope, that's not how it works.  Perhaps you should read the code.
See, e.g., heap_update().

Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company

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