Re: Tuple too big
От | Bruce Momjian |
---|---|
Тема | Re: Tuple too big |
Дата | |
Msg-id | 199907041422.KAA07112@candle.pha.pa.us обсуждение исходный текст |
Список | pgsql-hackers |
> > I've encountered a strange behavior of the VACUUM ANALYZE command. > > It seems that this command works only if the size of a text field > > does not exceed approximately 4050 bytes! So the real limit on > > tuple size is a half of the max tuple size. I've checked this effect > > on Postgres 6.4.2 (Sparc Solaris 2.5.1) and Postgres 6.5 (SUSE 6.1 > > Linux, kernel 2.2.5). Is this a bug or known feature? > > The python script used to reproduce this problem and results for > > v6.4.2 and v6.5 are follows. > > > OK, I have again written the code to allow tuples to take up a while block, rather than the 1/2 block limit you were seeing. It consists of a bunch of patches, so I can't send them to you, but it will be in 6.5.1, due out July 15th. Also, the snapshot on ftp.postgresql.org has the changes too. -- 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
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