Hello All
I am working with Barbara on this project and I am curios about what would be a good starting place for setting the max_fsm_relations and max_fsm_pages. Here are the current values max_fsm_pages = 153600 and the max_fsm_relations is set to the default of 1000. I have have read that the output from vacuum can help determine the values. We are using the autovacuum daemon. Is there some logging from that process that could help. Thanks John Allgood Senior Systems Administrator Turbo, division of OHL 2251 Jesse Jewell Pky. NE Gainesville, GA 30507 tel: (678) 989-3051 fax: (770) 531-7878 jallg...@ohl.com <mailto:jallg...@ohl.com> www.ohl.com <http://www.ohl.com> From: pgsql-admin-ow...@postgresql.org [mailto:pgsql-admin-ow...@postgresql.org] On Behalf Of Barbara Stephenson Sent: Tuesday, June 23, 2009 3:43 PM To: Tom Lane Cc: pgsql-admin@postgresql.org Subject: Re: [ADMIN] tuning our database by increasing shared buffer Thank ypu! Tom Lane wrote: Barbara Stephenson <barb...@turbocorp.com> <mailto:barb...@turbocorp.com> writes: We will be consolidating from 4 databases to 2 and want to make sure that these parameters are the only ones that need changing. Please advise. Current Future ===== ===== Max_connection = 50 125 Shared_buffers = 16MB 48MB You will need to make sure that the FSM size parameters are correct for the combined databases, too. Shouldn't we increase the max_locks_per_transaction from 64 to 100 or 128 since we have more than doubled the # of connections? No, because the lock table size automatically scales with max_connections. (Probably max_locks_per_transaction should have been called max_locks_per_connection ...) max_prepared_transaction is set at default of 5 which is says if we use it to set it to max_connection. Are you using prepared transactions at all? If not, I'd actually recommend setting that to zero to make sure nobody creates a prepared transaction accidentally. You do *not* want anyone doing PREPARE TRANSACTION unless there's an XA manager or something in place to make sure the prepared xact gets committed or rolled back reasonably soon. regards, tom lane -- Regards, Barbara Stephenson EDI Specialist/Programmer Turbo, division of OHL 2251 Jesse Jewell Pkwy Gainesville, GA 30507 tel: (678)989-3020 fax: (404)935-6171 barb...@turbocorp.com www.ohl.com ______________________________________________________ This e-mail transmission may contain information that is proprietary, privileged and/or confidential and is intended exclusively for the person(s) to whom it is addressed. Any use, copying, retention or disclosure by any person other than the intended recipient or the intended recipient's designees is strictly prohibited. If you are not the intended recipient or their designee, please notify the sender immediately by return e-mail and delete all copies.
