7.4 on Mac OS X 10.3 (Panther): initdb shmget fails
От | Steffen Schmidt |
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Тема | 7.4 on Mac OS X 10.3 (Panther): initdb shmget fails |
Дата | |
Msg-id | 13D857C3-1F5E-11D8-9584-000A956B0EB8@EMBL.de обсуждение исходный текст |
Ответы |
Re: 7.4 on Mac OS X 10.3 (Panther): initdb shmget fails
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Список | pgsql-ports |
Hi, I successfully compiled the 7.4 version on my machine but I run into the shared memory problem: The files belonging to this database system will be owned by user "hallo". This user must also own the server process. The database cluster will be initialized with locale C. fixing permissions on existing directory /Users/hallo/PgSQL... ok creating directory /Users/hallo/PgSQL/base... ok creating directory /Users/hallo/PgSQL/global... ok creating directory /Users/hallo/PgSQL/pg_xlog... ok creating directory /Users/hallo/PgSQL/pg_clog... ok selecting default max_connections... 10 selecting default shared_buffers... 50 creating configuration files... ok creating template1 database in /Users/hallo/PgSQL/base/1... FATAL: could not create shared memory segment: Cannot allocate memory DETAIL: Failed system call was shmget(key=1, size=1081344, 03600). HINT: This error usually means that PostgreSQL's request for a shared memory segment exceeded available memory or swap space. To reduce the request size (currently 1081344 bytes), reduce PostgreSQL's shared_buffers parameter (currently 50) and/or its max_connections parameter (currently 10). The PostgreSQL documentation contains more information about shared memory configuration. I found some newsgroup discussions / documentation about this issue but still there are some problems and I'd like to know the proper way to solve this problem. Solution 1: The solution I found was increasing the kernel kern.sysv.shmmax flag (i.e. editing the /etc/rc file and rebooting). But this is not a nice solution as my older postgres 7.3.4 daemon now doesn't start because of the same issue :-( - and I want to keep this daemon for a while Solution 2 (?): There are also the -N -B flags mentioned in the discussions. I modified initdb (i.e. added in the for loops 3 and 16 respectively) and it still doesn't work :-( (BW see the error message: 'max_connections (currently 10)' but I set them to 3 - I think there is an but in the script): ... selecting default max_connections... 3 selecting default shared_buffers... 16 creating configuration files... ok creating template1 database in /Users/sschmidt/PgSQL/base/1... FATAL: could not create shared memory segment: Cannot allocate memory DETAIL: Failed system call was shmget(key=1, size=794624, 03600). HINT: This error usually means that PostgreSQL's request for a shared memory segment exceeded available memory or swap space. To reduce the request size (currently 794624 bytes), reduce PostgreSQL's shared_buffers parameter (currently 16) and/or its max_connections parameter (currently 10). Hmm, could anyone give my advice on this issue? Steffen
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