Re: [GENERAL] rollback vs. commit for closing read-only transaction
For portability's sake commit successful transactions and rollback those that fail. Rick [EMAIL PROTECTED] wrote on 04/25/2005 05:53:11 PM: > "Dann Corbit" <[EMAIL PROTECTED]> writes: > > Probably, turning fsync off would be helpful, since you know it is > > read-only. > > Wouldn't make any difference: a transaction that hasn't modified the > database doesn't bother to write any commit/abort WAL record at all. > > regards, tom lane > > ---(end of broadcast)--- > TIP 3: if posting/reading through Usenet, please send an appropriate > subscribe-nomail command to [EMAIL PROTECTED] so that your > message can get through to the mailing list cleanly ---(end of broadcast)--- TIP 4: Don't 'kill -9' the postmaster
Re: [GENERAL] rollback vs. commit for closing read-only transaction
"Dann Corbit" <[EMAIL PROTECTED]> writes: > Probably, turning fsync off would be helpful, since you know it is > read-only. Wouldn't make any difference: a transaction that hasn't modified the database doesn't bother to write any commit/abort WAL record at all. regards, tom lane ---(end of broadcast)--- TIP 3: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly
Re: [GENERAL] rollback vs. commit for closing read-only transaction
Probably, turning fsync off would be helpful, since you know it is read-only. > -Original Message- > From: [EMAIL PROTECTED] [mailto:pgsql-general- > [EMAIL PROTECTED] On Behalf Of Bruce Momjian > Sent: Monday, April 25, 2005 3:01 PM > To: David Parker > Cc: postgres general > Subject: Re: [GENERAL] rollback vs. commit for closing read-only > transaction > > David Parker wrote: > > If an application transaction is known to be read-only, is there any > > reason to prefer COMMIT or ROLLBACK for closing that transaction? Would > > there be any performance difference between the two commands? > > Doesn't matter. > > -- > Bruce Momjian| http://candle.pha.pa.us > pgman@candle.pha.pa.us | (610) 359-1001 > + If your life is a hard drive, | 13 Roberts Road > + Christ can be your backup.| Newtown Square, Pennsylvania > 19073 > > ---(end of broadcast)--- > TIP 1: subscribe and unsubscribe commands go to [EMAIL PROTECTED] ---(end of broadcast)--- TIP 5: Have you checked our extensive FAQ? http://www.postgresql.org/docs/faq
Re: [GENERAL] rollback vs. commit for closing read-only transaction
David Parker wrote: > If an application transaction is known to be read-only, is there any > reason to prefer COMMIT or ROLLBACK for closing that transaction? Would > there be any performance difference between the two commands? Doesn't matter. -- Bruce Momjian| http://candle.pha.pa.us pgman@candle.pha.pa.us | (610) 359-1001 + If your life is a hard drive, | 13 Roberts Road + Christ can be your backup.| Newtown Square, Pennsylvania 19073 ---(end of broadcast)--- TIP 1: subscribe and unsubscribe commands go to [EMAIL PROTECTED]
