Re: Large objects [BLOB] again - general howto
От | Randolf Richardson |
---|---|
Тема | Re: Large objects [BLOB] again - general howto |
Дата | |
Msg-id | Xns943ECE71A8448rr8xca@200.46.204.72 обсуждение исходный текст |
Ответ на | array iteration? (CSN <cool_screen_name90001@yahoo.com>) |
Список | pgsql-general |
[sNip] > Here's a quick list of my experiences with BLOB's and such. > > Performance is just fine, I get about 1M hits a month and haven't had > any problems. Use a BLOB if you don't need to search though the data. > The main reason being that bytea and text types are parsed. To explain, > your entire SQL statement has to be parsed to make sure it's valid, this > includes you 100 meg jpeg. Slow, REAL slow. It appears that BLOBs are very well justified then. > I have found that it is best to have a separate connection for BLOB's > and one for everything else. Mind you, this is with Java, but the > autocommit settings on the connection don't appear to be thread safe, so > in high traffic you can accidentally cut off a transfer, or stop one > before it ever starts. What is your reason for using a separate connection? -- Randolf Richardson - rr@8x.ca Vancouver, British Columbia, Canada Please do not eMail me directly when responding to my postings in the newsgroups.
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