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Re: feature: dynamic DB cache resizing

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Ed L. wrote:
> We have ~75 pgsql clusters running in environments where downtime 
> comes at a premium cost.  We often run multiple clusters on a 
> single box, and find it necessary to adjust the size of the 
> static DB cache as we add or move clusters.  Unfortunately, that 
> means some downtime.  It would be extremely useful in minimizing 
> downtime to be able to dynamically resize the DB cache without 
> having to restart the cluster.  How hard would that be?

We can't think of how to do because it is all shared memory shared by
ever forked process --- does that help explain its complexity?
;-)

-- 
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@xxxxxxxxxxxxxxxx               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073


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