----- Original Message ----- From: "Warren W. Gay VE3WWG" <[EMAIL PROTECTED]> To: <[EMAIL PROTECTED]> Sent: Friday, March 14, 2003 4:45 PM Subject: Re: FreeBSD + MySQL bottleneck
<snip> > The OP didn't indicate where the files are being kept, and under FreeBSD > this can be significant. I know for example, that using UFS file systems, > are very slow compared to newer file systems. Yes. I am using UFS + softupdates. I wasn't aware that I could run ext3 on FreeBSD. > However, I suppose, they > have the trade off that they're perhaps "safer" in the event of a system > crash. But the disk I/O is much much heavier on a UFS file system, than > on some of the newer systems, like ext3 file systems. UFS seems to > insist on doing writes as soon as possible, to prevent accidental loss of > information due to a crash (just my guess, based upon the experience). > > I tried to speed up a very slow PostgreSQL database on UFS once.. I > turned off fsync(2) for the database, and that helped some, but the disk > I/O was still enormously extensive for what was going on. The same > database under Linux flies (ext3) (with significantly less disk I/O > activity). > > I was glad to see the MySQL supports the InnoDB in a partition (raw > disk space). This can eliminate the file system from the equation, > assuming that the necessary caching occurs in either the block device > or in the database engine (using a raw char device). > > -- > Warren W. Gay VE3WWG > http://home.cogeco.ca/~ve3wwg > > > > --------------------------------------------------------------------- > Before posting, please check: > http://www.mysql.com/manual.php (the manual) > http://lists.mysql.com/ (the list archive) > > To request this thread, e-mail <[EMAIL PROTECTED]> > To unsubscribe, e-mail <[EMAIL PROTECTED]> > Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php > > --------------------------------------------------------------------- Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail <[EMAIL PROTECTED]> To unsubscribe, e-mail <[EMAIL PROTECTED]> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
