256MB is guess (isn't that old, maybe 2y).The Problem occured before installing any packages btw.
Internet also fails (on LAN) after a while (while being up).
last pid: 28374; load averages: 0.69, 1.52, 0.89 up 0+00:08:14 18:47:35
112 processes: 2 running, 93 sleeping, 4 zombie, 13 waiting
CPU: 0.4% user, 0.4% nice, 0.8% system, 0.4% interrupt, 98.1% idle
Mem: 66M Active, 1820K Inact, 61M Wired, 764K Cache, 34M Buf, 104M Free
Swap:
PID USERNAME PRI NICE SIZE RES STATE TIME WCPU COMMAND
10 root 171 ki31 0K 8K RUN 2:17 89.99% idle
21883 root 65 20 10748K 4860K kqread 0:01 1.95% bandwidthd
0 root -16 0 0K 48K sched 0:39 0.00% {swapper}
11 root -64 - 0K 104K WAIT 0:20 0.00% {irq14: ata0}
9 root -16 - 0K 8K psleep 0:02 0.00% pagedaemon
11 root -40 - 0K 104K WAIT 0:02 0.00% {swi2: cambio}
4 root -8 - 0K 8K - 0:02 0.00% g_down
13 root -16 - 0K 8K - 0:02 0.00% yarrow
46463 root 52 0 33116K 0K accept 0:01 0.00% <php>11 root -68 - 0K 104K WAIT 0:01 0.00% {irq11: vr1}
39477 root 64 20 10748K 3852K bpf 0:01 0.00% bandwidthd
44678 root 76 0 34140K 0K accept 0:01 0.00% <php>11 root -68 - 0K 104K WAIT 0:01 0.00% {irq10: vr0}
11 root -32 - 0K 104K WAIT 0:01 0.00% {swi4: clock}
3 root -8 - 0K 8K - 0:01 0.00% g_up
46390 root 76 0 34140K 0K accept 0:01 0.00% <php>15 root -16 - 0K 8K psleep 0:01 0.00% vmdaemon
46945 root 60 0 34140K 0K accept 0:01 0.00% <php>14 root -64 - 0K 72K - 0:01 0.00% {usbus1}
35 root -8 - 0K 8K mdwait 0:01 0.00% md1
39810 root 64 20 8700K 3132K bpf 0:01 0.00% bandwidthd
8548 root 44 0 7992K 1948K select 0:00 0.00% sshd
40169 root 44 0 6588K 2964K kqread 0:00 0.00% lighttpd
16571 root 64 20 3656K 512K wait 0:00 0.00% sh
40955 root 76 0 32092K 0K wait 0:00 0.00% <php>41487 root 76 0 32092K 0K wait 0:00 0.00% <php>40749 root 70 0 32092K 0K wait 0:00 0.00% <php>41179 root 76 0 32092K 0K wait 0:00 0.00% <php>42026 root 44 0 3316K 996K select 0:00 0.00% apinger
11278 root 44 0 9488K 2644K select 0:00 0.00% {mpd5}</php></php></php></php></php></php></php></php>