ext3 + db = slooooow

[Matthias Andree]

On Fri, 31 Jan 2003, Greg Louis wrote:

> That's true, and I'd be the first to agree that _this_ notebook's hard
> disk is very noticeably sluggish!  However, I've now run the job on the
> same partition on the same machine (not the notebook), mounted as ext2
> and mounted as ext3; as ext2 it takes three minutes, as ext3 fourteen.
> (10,000rpm SCSI but 400MHz PII / 128 Mb RAM)

Hum. I'm unsure who will be interested in these figures, if it is
SleepyCat or the kernel hackers, but one of these teams will care or
have a hint unless your software is very old.

We know kernel write latency is very high, though elvtune might also
help your write performance, but I can't say at all which direction to
turn the knobs.