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RE: lug-bg: memory menagment again...-2.4.X eats swap


  • Subject: RE: lug-bg: memory menagment again...-2.4.X eats swap
  • From: bkrosnov@xxxxxxxx (Boyan Krosnov)
  • Date: Mon, 18 Jun 2001 19:10:55 +0300



hm na kakwo popadnah :)
---- alan cox' diary, june 14th
Finished all of Harry Potter. I now see a major fight breaking out
between Telsa and me over who reads the next one first once it comes
out. 

I did manage to finally push out the changes I had been accumulating
over the past few days, including the main VM changes that are also in
2.4.6pre and seem to massively improve performance when swapping. 
-----
i btw ne e redno da imate swap po-malko ot 2xRAM + nqkoi i drug
megabait.
s 2.4 kerneli ima problemi s po-malko swap. horata kazwat taka ili pone
2xRAM ili 0 swap.

BR,
Boyan

-----Original Message-----
From: George Danchev [mailto:danchev@xxxxxxxxx]
Sent: Monday, June 18, 2001 4:15 PM
To: lug-bg@xxxxxxxxxxxxxxxxxx
Subject: Re: lug-bg: memory menagment again...-2.4.X eats swap

mdaaa losho ,
Poneje Ivailo Sredkov povdigna vuprosa za MM v 2.4.x , ta reshih i az da
se 
opitam da "izpadna" v negovoto polojenie . Do sega si reboot-vah
mashinata po 
nqkolko puti na den za da vlizam ot OS v OS , i za men problema ostana
skrit 
, no ot  3-4 dena ne sum reboot , i si ba4kam ot wreme na wreme ,  za da
vidq 
kakvo ste se polu4i . Zna4i Celeron300A 64MB , Debian sid , linux-2.4.4
, 
linuxswap=104MB . Napravi mi vpe4atlenie 4e ne se osvodojdava adekwatno 
koli4estvo  swap ,  vupreki 4e spiram i kill-vam  procesi , i  s te4enie
na 
wremeto zaetostta na swapa si raste . Dnes  poglejdam  i ustanovqwam 4e
se 
polzwa 77 MB swap, pri startirani X, GNOME+icewm , XMMS i standartnite 
daemons na fona - apache , proftpd , syslogd  - nisto osobeno (na
mashinata 
ne e raboteno okolo 1 den )!!! Qvno sa  swap-nati stari procesi koito sa
bili 
startirani i sprqni otdavna , i swap dqla ne se po4istwa ot tqh - a te
sa si 
ve4e 4ist trash . Vsustnost nqmam predstava kakuv e algorituma za
zaemane i 
osvobojdavane na swap space .  Nacukah naburzo nqkolko  memory-eating
apps - 
4 Mozilli , 2 Netscape6  , i nakraq 1  OpenOffice i edva uspqh da izlqza
na 
console i s free da nabludawam kak swapa raste ot 77 kum 104 . Kernela
po4na 
da killva procesi - purvo si haresa apacheto , oba4e scriptovete go 
restartiraha , i se zapo4na bezkone4na borba . Neznam zasto kernela ne  
killna X-sa , ta doide wreme i az da ne moga da go killna, nemojeshe  i
bukva 
da se napishe na terminala , vidqh ot posledniq  output na free 4e 100MB
swap se polzwa i krai . Ostana samo diskova aktivnost , iz4akah go blizo
edin 
4as , i go restartirah .

REBOOT  - tuka malko strah dokato mine fsck . 
 i ve4e 4ist swap,  i startirani sustite memory-eating apps -
X, Gnome+icewm , 4 Mozilli , 2 Netscape6 , 1 OpenOffice , XMMS
i sustite daemons na fona . Dori sega e startiran i KMail .
debian:~# free
             total       used       free     shared    buffers
cached
Mem:         60764      59812        952          0        676
42760
-/+ buffers/cache:      16376      44388
Swap:       104384      90236      14148
debian:~#
Tova e normalnoto , a predi reboota , kernela ne uspq da po4isti swapa
ot 
 trash-a , 4e novite apps da mogat da budat swap-wani  . 

Close Mozilii , Netscape6 i OpenOffice i swapa se poosvobodi malko ,
t.e. 
ostavat 
X, Gnome+icewm , XMMS (kakto predi )
debian:~# free
             total       used       free     shared    buffers
cached
Mem:         60764      59808        956          0       1604
48116
-/+ buffers/cache:      10088      50676
Swap:       104384      51704      52680
debian:~#

Siguren 4e na swapa sa ostanali "par4eta" ot programi , koito ste si
ostanat 
ve4no tam ( do reboot, ili swapoff , swapon) i nqma da budat po4isteni
dori i 
da  ne se polzwat ve4e ili budat deinstalirani i t.n. restrictivni merki
.
Prosto swap-a vse oste e "4ist" i ne e raboteno s nego .  

Close-wam vsi4ki X-sovski apps i X-sa 
             total       used       free     shared    buffers
cached
Mem:         60764      59808        956          0       1212
52456
-/+ buffers/cache:       6140      54624
Swap:       104384      34188      70196

Swapoff 
          total       used       free     shared    buffers     cached
Mem:         60764      59304       1460          0       1924
31840
-/+ buffers/cache:      25540      35224
Swap:            0          0          0
mojelo  da se vmesti v moite skromni 64 MB RAM 

Swapon 
            total       used       free     shared    buffers     cached
Mem:         60764      59192       1572          0       1992
31808
-/+ buffers/cache:      25392      35372
Swap:       104384          0     104384

Startx : X , Gnome+icewm , XMMS . (Dori sega i KMail )
            total       used       free     shared    buffers     cached
Mem:         60764      59676       1088          0       2092
22108
-/+ buffers/cache:      35476      25288
Swap:       104384      21632      82752
Sravnqwam  posledniq output s purviq pri koito mi polzwashe 77MB swap ,
kato 
mashinata e sedqla pone edin den samo s tezi apps .
Outputa pak s 4 Mozilli , 2 Netscape6 i OpenOffice ste vi go spestq , 
no RAM+swap sa dostatu4ni , dokato vse oste swap-a ne e zamursen ot 
"nepo4istvaemi" leketa , i reshenieto e reboot ili swapoff swapon ako
4ovek 
moje da si go pozvoli . 

Nadqwam se polzwatelite na 2.4.X da spodelqt kak toi im polzwa swapa ,
pri 
agresiven load , no ve4e vidqh tozi problem da se diskutira v oste edin
mail 
list .  Alan Cox susto e pisal nqkude  4e tozi problem sustestvuva za
2.4.X 
kernels , i se nadqwat da go fix-nat . Na LKML susto ima nqkakvo info po

vuprosa , no vse oste ne sum go 4el . 

Neznam kernela ili apps sa vinovni 4e da ostawat tezi "leketa" na swapa
, no 
tozi problem go nqmashe v 2.2.17-2.2.19 , puk i posledniq  e za
predpo4itane 
v momenta , ako mashinata e na otgovorno mqsto . 

On Saturday 16 June 2001 11:18, you wrote:
> > kak da tylkuwam rezultatite? move li da se smqta che towa e
normalno?
> > koe ot dwete qdra se sprawq po-dobre s izpolzwaneto
> > na pametta?
> > Ivaylo
>
> Ami az ne znam koe e pravilnoto povedenie, no spored men e
po-efectivno da
> se darji goliam diskov cache za smetka na parcheta pamet koito ne sa
> izpolzvani dalgo vreme. T.e. moje da si imash zareden Netscape, no ako
ne
> si go pipal ot 3 minuti a activno rabotish s diskovata systema, to
po-dobre
> da imash diskov cache a Netscape da liaga da spi v swap file puk kato
> potriabva shte go izvadi ottam. Vaprosa e samo kak da se pretseni koe
e
> mnogo ili malko vreme za da swap out niakoia oblast ot pametta...

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