[server debian] memoria che cresce nel tempo

[sylvaticus]

E' normale che con un server LAMP debian la memoria sia ok all'inizio ma poi cresca? Pensavo a un memory leak, ma poi riflettendo potrebbe anche essere che semplicemente i processi all'inizio non sono troppo impegnati.. bho???

Comunque questi sono i piei "top":

Dopo pochi minuti....
top - 15:42:39 up 7 min, 1 user, load average: 0.04, 0.05, 0.02
Tasks: 57 total, 2 running, 55 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.0% us, 0.0% sy, 0.0% ni, 100.0% id, 0.0% wa, 0.0% hi, 0.0% si
Mem: 131216k total, 112368k used, 18848k free, 4724k buffers
Swap: 262136k total, 0k used, 262136k free, 51104k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
4404 mysql 15 0 27936 5148 4256 S 0.0 3.9 0:00.00 mysqld
4406 mysql 16 0 27936 5148 4256 S 0.0 3.9 0:00.00 mysqld
4407 mysql 16 0 27936 5148 4256 S 0.0 3.9 0:00.00 mysqld
4754 root 16 0 13664 5216 3580 S 0.0 4.0 0:00.06 apache
5364 www-data 16 0 20580 10m 2608 S 0.0 8.3 0:00.40 apache
5366 www-data 16 0 21196 11m 2604 S 0.0 8.8 0:00.17 apache
4759 www-data 16 0 18260 8464 2484 S 0.0 6.5 0:00.08 apache
5365 www-data 16 0 19844 9.8m 2420 S 0.0 7.6 0:00.37 apache
5342 root 16 0 6684 1872 1492 R 0.0 1.4 0:00.01 sshd
5344 root 16 0 6684 1872 1492 S 0.0 1.4 0:00.00 sshd
5367 postfix 15 0 3492 1756 1468 S 0.0 1.3 0:00.00 smtpd
4859 root 16 0 8756 4996 1352 S 0.0 3.8 0:00.00 miniserv.pl
4862 root 16 0 8756 4996 1352 S 0.0 3.8 0:00.01 miniserv.pl
5372 postfix 17 0 3244 1572 1344 S 0.0 1.2 0:00.00 local
5371 postfix 16 0 3236 1564 1336 S 0.0 1.2 0:00.01 cleanup
4610 root 16 0 6140 1732 1300 S 0.0 1.3 0:00.01 dovecot-auth
5370 postfix 15 0 3220 1516 1292 S 0.0 1.2 0:00.01 trivial-rewrite
5346 root 16 0 3084 1664 1212 S 0.0 1.3 0:00.01 bash
4612 dovecot 16 0 3048 1416 1188 S 0.0 1.1 0:00.02 pop3-login
5336 dovecot 16 0 3048 1420 1188 S 0.0 1.1 0:00.01 pop3-login
5337 dovecot 16 0 3044 1416 1188 S 0.0 1.1 0:00.03 pop3-login
4558 postfix 16 0 3076 1248 1048 S 0.0 1.0 0:00.01 qmgr
4343 root 25 0 2600 1280 1036 S 0.0 1.0 0:00.02 mysqld_safe
4557 postfix 16 0 3040 1204 1024 S 0.0 0.9 0:00.00 pickup
4554 root 15 0 3036 1172 988 S 0.0 0.9 0:00.01 master
5368 postfix 16 0 3044 1144 972 S 0.0 0.9 0:00.00 proxymap
5382 root 16 0 2128 1072 848 R 0.0 0.8 0:00.01 top
4565 root 16 0 3804 956 712 S 0.0 0.7 0:00.00 sshd
4599 root 16 0 1816 752 612 S 0.0 0.6 0:00.00 cron
4320 root 16 0 2876 1400 580 S 0.0 1.1 0:00.00 named
4581 root 15 0 3052 752 564 S 0.0 0.6 0:00.69 dovecot
4311 root 16 0 1624 556 456 S 0.0 0.4 0:00.00 syslogd
1 root 16 0 1580 516 452 S 0.0 0.4 0:00.02 init
4405 root 25 0 1568 504 440 S 0.0 0.4 0:00.00 logger
4454 root 21 0 1608 488 424 S 0.0 0.4 0:00.00 inetd
4762 root 16 0 1576 488 424 S 0.0 0.4 0:00.00 getty

...& dopo un paio d'ore...

server:~# top
top - 17:53:27 up 2:18, 2 users, load average: 0.00, 0.00, 0.00
Tasks: 57 total, 1 running, 56 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.0% us, 0.3% sy, 0.0% ni, 99.7% id, 0.0% wa, 0.0% hi, 0.0% si
Mem: 131216k total, 113452k used, 17764k free, 5512k buffers
Swap: 262136k total, 24544k used, 237592k free, 29024k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
4404 mysql 15 0 27940 5128 4004 S 0.0 3.9 0:00.00 mysqld
4406 mysql 16 0 27940 5128 4004 S 0.0 3.9 0:00.00 mysqld
4407 mysql 15 0 27940 5128 4004 S 0.0 3.9 0:00.01 mysqld
4759 www-data 16 0 31268 13m 3040 S 0.0 10.9 0:03.10 apache
5364 www-data 15 0 31856 20m 2976 S 0.0 15.8 0:03.75 apache
5365 www-data 16 0 29384 13m 2880 S 0.0 10.9 0:03.77 apache
4754 root 16 0 13664 4464 2868 S 0.0 3.4 0:00.08 apache
5366 www-data 15 0 21224 10m 2836 S 0.0 8.3 0:03.62 apache
6211 www-data 16 0 18232 8688 2740 S 0.0 6.6 0:02.66 apache
7351 root 16 0 6684 1836 1492 S 0.0 1.4 0:00.00 sshd
7353 root 16 0 6684 1836 1492 S 0.0 1.4 0:00.00 sshd
5342 root 16 0 6684 1808 1464 S 0.0 1.4 0:00.04 sshd
5344 root 16 0 6684 1808 1464 S 0.0 1.4 0:00.00 sshd
4862 root 16 0 8756 2852 1376 S 0.0 2.2 0:00.04 miniserv.pl
4859 root 16 0 8864 3844 1372 S 0.0 2.9 0:00.01 miniserv.pl
7355 root 15 0 3084 1664 1216 S 0.0 1.3 0:00.00 bash
4610 root 16 0 6140 1628 1196 S 0.0 1.2 0:00.06 dovecot-auth
7274 dovecot 16 0 3048 1420 1188 S 0.0 1.1 0:00.10 pop3-login
7275 dovecot 16 0 3048 1420 1188 S 0.0 1.1 0:00.08 pop3-login
7347 dovecot 16 0 3048 1420 1188 S 0.0 1.1 0:00.08 pop3-login
5346 root 15 0 3084 1632 1180 S 0.0 1.2 0:00.01 bash
4558 postfix 16 0 3076 1248 1048 S 0.0 1.0 0:00.02 qmgr
4343 root 25 0 2600 1280 1036 S 0.0 1.0 0:00.02 mysqld_safe
6998 postfix 16 0 3040 1204 1024 S 0.0 0.9 0:00.00 pickup
4554 root 16 0 3036 1172 988 S 0.0 0.9 0:00.02 master
7361 root 16 0 2128 1072 852 R 0.0 0.8 0:00.00 top
7029 root 16 0 2128 1060 844 S 0.0 0.8 0:00.61 top
4565 root 16 0 3804 908 720 S 0.0 0.7 0:00.00 sshd
4599 root 16 0 1816 752 612 S 0.0 0.6 0:00.00 cron
4320 root 17 0 2876 904 584 S 0.0 0.7 0:00.00 named
4581 root 15 0 3052 656 564 S 0.3 0.5 0:05.95 dovecot
4311 root 16 0 1624 556 456 S 0.0 0.4 0:00.00 syslogd
1 root 16 0 1580 516 452 S 0.0 0.4 0:00.02 init
4405 root 25 0 1568 504 440 S 0.0 0.4 0:00.00 logger
4454 root 21 0 1608 488 424 S 0.0 0.4 0:00.00 inetd
4762 root 16 0 1576 480 416 S 0.0 0.4 0:00.00 getty


Che ne pensate??? Perchè si mette ad usare la swap???

/Sylvaticus

[sacarde]

ho gia' sentito di questo problema..... forse anche su questo forum

riporto .........:

"linux cerca di occupare tutta la ram possibile per poterla usare più
velocemente all'occorrenza.
I comandi che ti servono per capire l'occupazione reale sono vmstat e
free"

[sylvaticus]

..grazie ma ora ci capisco ancora meno...
che co'è la memoria attiva/inattiva o quella usata come cache V.S. quella usata come buffers (termini tratti da "man vmstat") ?? :-((

[sacarde]

http://lists.pluto.it/pipermail/plut...ch/009031.html

http://www.gentoo.it/doc/memory.html