Re: Antw: LMDB performance tip

[Howard Chu <hyc@symas.com>]

Ulrich Windl wrote:
> > > > Howard Chu <hyc@symas.com> schrieb am 07.11.2014 um 11:16 in Nachricht
> <545C9BFF.9090004@symas.com>:
> > Ulrich Windl wrote:
> > > > > > Howard Chu <hyc@symas.com> schrieb am 06.11.2014 um 14:42 in Nachricht
> > > <545B7AC9.3060207@symas.com>:
> > > > Just recently measured: when doing a bulk-load of a DB that's larger than
> > > > RAM,
> > > > it's faster to turn off WRITEMAP and just use regular writes.
> > >
> > > Doesn't that depend on the ratio of change compared to the size of RAM or
> > DB?
> >
> > Read and think before you post. You have no idea WTH you're talking about,
> > but
> > you could easily have read the code or docs or papers before posting and
> > actually known something.
>
> I cannot follow your reasoning why you think that I don't think, and what
> convinced you that I have no idea what I'm taking about.
>
> Wasn't it you who made some vague performance statement/recommendation
> without presenting any numbers or details on the tests one might assume you
> have made before writing?

There is nothing vague about "bulk-load a DB that's larger than RAM."

> I also don't see why I should read your code just because you made some
> statements I cannot follow.

If you aren't going to do the basic homework then you have nothing to contribute.

--
  -- Howard Chu
  CTO, Symas Corp.           http://www.symas.com
  Director, Highland Sun     http://highlandsun.com/hyc/
  Chief Architect, OpenLDAP  http://www.openldap.org/project/