Thread: Error: shmget failed
Hi Sorry if it´s the wrong place to post this. Please let me know where is the correct place. I'm upgrading from PostgreSQL 6.4 to 6.5.2. I compiled 6.5.2 and installed it in an machine (that was not running 6.4) for tests but Postmaster want not run. Os: Sun sparc solaris 2.5 compiled with GCC 2.8.1, FLEX 2.5.4 Compilation and install runs OK! Initidb could not tell what username to use (I was su postgres) so I tried initdb -u postgres and works, see bellow: $ LD_LIBRARY_PATH=/usr/local/pgsql/lib $ export LD_LIBRARY_PATH $ initdb Can't tell what username to use. You don't have the USER environment variable set to your username and didn't specify the --username option $ initdb -u postgres We are initializing the database system with username postgres (uid=1156). This user will own all the files and must also own the server process. Creating Postgres database system directory /usr/local/pgsql/data Creating Postgres database system directory /usr/local/pgsql/data/base Creating template database in /usr/local/pgsql/data/base/template1 Creating global classes in /usr/local/pgsql/data/base Adding template1 database to pg_database... Vacuuming template1 Creating public pg_user view Creating view pg_rules Creating view pg_views Creating view pg_tables Creating view pg_indexes Loading pg_description $ I tried to start postmaster and it report an error, see bellow: $ nohup postmaster -i > pserver.log 2>&1 & [1] 17192 $ ps -ef | grep post postgres 6006 529 0 10:22:05 pts/1 0:00 ksh postgres 17225 6006 1 11:01:41 pts/1 0:00 grep post [1] + Done nohup postmaster -i > pserver.log 2>&1 & $ cat pserver.log IpcMemoryCreate: shmget failed (Invalid argument) key=5432001, size=1073152, permission=600 FATAL 1: ShmemCreate: cannot create region $ I have tried 3 times this installation and the result is the same. I installed 6.5.2 in my house linux machine and work well. Thank you for your attention Roberto
Roberto Joao Lopes Garcia <roberto@mha.com.br> writes:
> I tried to start postmaster and it report an error, see bellow:
> IpcMemoryCreate: shmget failed (Invalid argument) key=5432001,
> size=1073152, permission=600
> FATAL 1: ShmemCreate: cannot create region
As a quick hack you can start the postmaster with smaller-than-
normal -B and -N (say -B 40 -N 20). Long term solution is to
increase your kernel's SHMMAX limit to more than 1 megabyte.
I thought we had adjusted the default -B and -N to stay just
under a meg, which is the default SHMMAX value on many kernels.
But it looks like someone chewed up some more shared memory when
I wasn't looking :-(.
regards, tom lane
> Roberto Joao Lopes Garcia <roberto@mha.com.br> writes: > > I tried to start postmaster and it report an error, see bellow: > > IpcMemoryCreate: shmget failed (Invalid argument) key=5432001, > > size=1073152, permission=600 > > FATAL 1: ShmemCreate: cannot create region > > As a quick hack you can start the postmaster with smaller-than- > normal -B and -N (say -B 40 -N 20). Long term solution is to > increase your kernel's SHMMAX limit to more than 1 megabyte. > > I thought we had adjusted the default -B and -N to stay just > under a meg, which is the default SHMMAX value on many kernels. > But it looks like someone chewed up some more shared memory when > I wasn't looking :-(. 7.0 backend will point them to FAQ on such errors. -- Bruce Momjian | http://www.op.net/~candle maillist@candle.pha.pa.us | (610) 853-3000+ If your life is a hard drive, | 830 Blythe Avenue + Christ can be your backup. | Drexel Hill, Pennsylvania19026
Hi To change maximun Shared Memory segment size in my Sparc Solaris 2.5, I have to add the following line into /etc/system file and then reboot the system set shmsys:shminfo_shmmax=268435456 It solved the problem. Also, Solaris ANSWER BOOK recomends to change the follow. Please note that I do not test the lines bellow in my system, only the above change in /etc/system solved the problem. set semsys:seminfo_semmap=250set semsys:seminfo_semmni=500set semsys:seminfo_semmns=500set semsys:seminfo_semmsl=500set semsys:seminfo_semmnu=500set semsys:seminfo_semume=100set semsys:seminfo_shmmin=200set semsys:seminfo_shmmni=200set semsys:seminfo_shmseg=200 To see the actual system sets one can use the command sysdef that, in my system produce the follow: #sysdef... ... * * IPC Semaphores * 10 entries in semaphore map (SEMMAP) 10 semaphore identifiers (SEMMNI) 60 semaphores in system (SEMMNS) 30 undo structures in system (SEMMNU) 25 max semaphores per id (SEMMSL) 10 max operations per semop call (SEMOPM) 10 max undo entries per process (SEMUME)32767 semaphore maximum value (SEMVMX)16384 adjust on exit max value (SEMAEM) * * IPC Shared Memory * 268435456 max shared memory segment size (SHMMAX) 1 min shared memory segment size (SHMMIN) 100 shared memory identifiers (SHMMNI) 6 max attached shm segments per process (SHMSEG) * * Time Sharing Scheduler Tunables * 60 maximum time sharing user priority (TSMAXUPRI) SYS system class name (SYS_NAME) # Please read the man pages before execute this command or the changes showed above. Thank you for you help Roberto At 12:51 26/10/99 -0400, you wrote: >> Roberto Joao Lopes Garcia <roberto@mha.com.br> writes: >> > I tried to start postmaster and it report an error, see bellow: >> > IpcMemoryCreate: shmget failed (Invalid argument) key=5432001, >> > size=1073152, permission=600 >> > FATAL 1: ShmemCreate: cannot create region >> >> As a quick hack you can start the postmaster with smaller-than- >> normal -B and -N (say -B 40 -N 20). Long term solution is to >> increase your kernel's SHMMAX limit to more than 1 megabyte. >> >> I thought we had adjusted the default -B and -N to stay just >> under a meg, which is the default SHMMAX value on many kernels. >> But it looks like someone chewed up some more shared memory when >> I wasn't looking :-(. > >7.0 backend will point them to FAQ on such errors. > >-- > Bruce Momjian | http://www.op.net/~candle > maillist@candle.pha.pa.us | (610) 853-3000 > + If your life is a hard drive, | 830 Blythe Avenue > + Christ can be your backup. | Drexel Hill, Pennsylvania 19026 > >************ > >