cvs commit: src/sys/sys proc.h src/sys/kern kern_thread.c subr_sleepqueue.c

[Mike Silbersack]

On Wed, 28 Apr 2004, Daniel Eischen wrote:

> > Interestingly enough, in addition to stumbling upon this problem with
> > mysql, the benchmarking I'm doing for a class project also found a problem
> > in the mysql client libraries.  For some reasons, when selecting blobs,
> > libmysql will get into a loop where it does 4 byte reads.  Yes, it will
> > read entire 100K objects 4 bytes at a time.  I'll post about this to the
> > relevant mailing lists next week...
>
> That sounds like a mysql bug.  The threads libraries (except for
> libc_r) don't do anything with read().
>
> --
> Dan Eischen

Apologies, I didn't mean to implicate the threading libraries in regards
to this bug.  The client program that's doing the dumb reads isn't
threaded.

I mentioned it in the same thread because I was thinking that if this
client bug is slowing down MySQL's client libraries on all FreeBSD
systems, then once it's fixed _and_ libpthread works well, MySQL will
really fly!

Mike "Silby" Silbersack