Tom Lane wrote:
Adrian Klaver <aklaver@xxxxxxxxxxx> writes:
On Sunday 24 September 2006 09:17 am, Tom Lane wrote:
Jon Lapham <lapham@xxxxxxxxx> writes:
FATAL: pre-existing shared memory block (key 5432001, ID 65536) is
still in use
This is extremely odd, because a shared memory block could not possibly
have survived a reboot.
In the its a small world department I experienced the same problem shortly
after reading this message.
I spent quite some time today trying to duplicate this failure (by
pulling the plug on an up-to-date Fedora Core 5 machine). No luck.
I suppose there is some contributing factor on your machines that
we haven't identified yet ...
For what it is worth, I created a FC5 VMware installation and loaded my
database data into it. I simulated a bunch of power outages by telling
VMware to power off the vm. Is this a good simulation of a power
outage, or is there something inherently flawed about using a VM to test
this?
To stress test, I turned off the power while actively processing db
operations, such as: loading data into a database, create a new
database, delete contents of a large table within a transaction.
Anyway, in every case I could not reproduce the issue, postgresql came
back flawlessly. I am willing to run any power outage simulation tests
people may have.
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Jon Lapham <lapham@xxxxxxxxx> Rio de Janeiro, Brasil
Personal: http://www.jandr.org/
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