On Tue, Jan 21, 2014 at 1:05 PM, Fujii Masao <masao.fu...@gmail.com> wrote: > When I shut down the standby server and then the master server in that order, > I found that the master server emit the following message. > > LOG: XX000: could not remove shared memory segment > "/PostgreSQL.1804289383": Invalid argument > LOCATION: dsm_impl_posix, dsm_impl.c:269 > > Is this intentional message or a bug? > > $ uname -a > Darwin test.local 11.4.2 Darwin Kernel Version 11.4.2: Thu Aug 23 > 16:25:48 PDT 2012; root:xnu-1699.32.7~1/RELEASE_X86_64 x86_64 > > I used the latest version of the source code in the git master.
Urgh. I think what happened is that, when you cloned the master to produce the standby, you also copied the pg_dynshmem directory, which cause the standby to latch onto the master's control segment and blow it away on startup. When the master tried to shut down, it got unhappy. I think this is further evidence that we need to get rid of the state file; while I haven't agreed with Heikki's comments on this topic in their entirety, there is clearly a problem here that needs to get fixed somehow. Latest discussion of this topic is here: http://www.postgresql.org/message-id/CA+TgmoZAkz3yrZkm8D=n27dsc00pdqsshzljbkq29_twqge...@mail.gmail.com -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
