Re: Plain 2.4.5 VM...

["Jakob Østergaard" <jakob@unthought.net>]

On Tue, May 29, 2001 at 11:32:09AM +0900, G. Hugh Song wrote:
> 
> Jeff Garzik wrote: 
> > 
> > Ouch! When compiling MySql, building sql_yacc.cc results in a ~300M 
> > cc1plus process size. Unfortunately this leads the machine with 380M of 
> > RAM deeply into swap: 
> > 
> > Mem: 381608K av, 248504K used, 133104K free, 0K shrd, 192K 
> > buff 
> > Swap: 255608K av, 255608K used, 0K free 215744K 
> > cached 
> > 
> > Vanilla 2.4.5 VM. 
> > 
> 
> This bug known as the swap-reclaim bug has been there for a while since 
> around 2.4.4.  Rick van Riel said that it is in the TO-DO list.
> Because of this, I went back to 2.2.20pre2aa1 on UP2000 SMP.
> 
> IMHO, the current 2.4.* kernels should still be 2.3.*.  When this bug
> is removed, I will come back to 2.4.*.

Just keep enough swap around.  How hard can that be ?

Really, it's not like a memory leak or something.  It's just "late reclaim".

If Linux didn't do over-commit, you wouldn't have been able to run that job
anyway.

It's not a bug.  It's a feature.  It only breaks systems that are run with "too
little" swap, and the only difference from 2.2 till now is, that the definition
of "too little" changed.

-- 
................................................................
:   jakob@unthought.net   : And I see the elder races,         :
:.........................: putrid forms of man                :
:   Jakob Østergaard      : See him rise and claim the earth,  :
:        OZ9ABN           : his downfall is at hand.           :
:.........................:............{Konkhra}...............: