No ram left?

[knasbas]

I recently saw that im very short on ram and not really sure why?
Besides top(shown below), is there any possibility to see what process has been using/leaking or whatever has happened?
I have heard that rtorrent has some kind of leak but it hasnt been any problem so far so why would it be that if i havent changed it.

I added 512mb of ram about 2 weeks ago when i noticed that i was low on ram but it didnt really change anything.
top output:

load averages:  0.09,  0.11,  0.08                                                                          10:47:24
33 processes:  32 idle, 1 on processor
CPU states:  0.0% user,  0.0% nice,  0.0% system,  0.0% interrupt,  100% idle
Memory: Real: 22M/1262M act/tot  Free: 243M  Swap: 16M/5120M used/tot

  PID USERNAME PRI NICE  SIZE   RES STATE    WAIT      TIME    CPU COMMAND
 8605 www        2    0 2876K 4172K sleep    netio     0:13  1.27% httpd
30822 root       2    0  964K 1112K sleep    select    0:29  0.00% sendmail
 6643 www        2    0 2928K 4180K sleep    netio     0:25  0.00% httpd
20984 www        2    0 2948K 1160K sleep    netio     0:24  0.00% httpd
 1896 root       2    0 2704K  380K sleep    select    0:30  0.00% httpd
16326 www        2    0 2860K 1164K sleep    netio     0:21  0.00% httpd
18154 www        2    0 2916K 4176K sleep    netcon    0:17  0.00% httpd
26836 www        2    0 2872K 4176K sleep    netcon    0:16  0.00% httpd
25336 www        2    0 3044K 4176K sleep    netio     0:15  0.00% httpd
13111 www        2    0 2908K 4172K sleep    netcon    0:13  0.00% httpd
31382 www        2    0 2868K 4176K sleep    netio     0:12  0.00% httpd
18432 root       2    0 1032K  892K sleep    select    0:12  0.00% nmbd
 8432 _syslogd   2    0  476K  632K sleep    poll      0:07  0.00% syslogd
12957 root       2    0  528K    4K idle     select    0:05  0.00% sshd
23574 root       2    0 3176K 1192K idle     select    0:05  0.00% smbd
 5300 www        2    0 2872K 1152K sleep    netcon    0:05  0.00% httpd
 9182 root       2    0  456K    4K idle     select    0:03  0.00% inetd
 8915 root       2    0  468K  512K idle     select    0:01  0.00% cron
    1 root      10    0  320K   96K idle     wait      0:00  0.00% init
12533 root       2    0 2776K    4K idle     select    0:00  0.00% smbd
17143 _dhcp      2    0  344K    4K idle     poll      0:00  0.00% dhclient
 5756 root       2    0 3536K 2500K sleep    select    0:00  0.00% sshd
12244 root      28    0  552K 1344K onproc   -         0:00  0.00% top
 5089 root       2    0  296K    4K idle     poll      0:00  0.00% dhclient
27067 root       2    0  440K    4K idle     netio     0:00  0.00% syslogd
30210 root      10    0  936K 1576K idle     wait      0:00  0.00% bash
  580 root       3    0  240K    4K idle     ttyin     0:00  0.00% getty
 7592 root       3    0  232K    4K idle     ttyin     0:00  0.00% getty
31051 root       3    0  312K    4K idle     ttyin     0:00  0.00% getty
23669 root       3    0  240K    4K idle     ttyin     0:00  0.00% getty
 5672 root       3    0  300K    4K idle     ttyin     0:00  0.00% getty
17163 www        2    0 2704K 1772K sleep    netcon    0:00  0.00% httpd
 8239 root      18    0 2776K    4K idle     pause     0:00  0.00% smbd

dmesg output:

OpenBSD 4.5-stable (GENERIC) #0: Wed Jul 22 16:12:03 CEST 2009
    root@:/usr/src/sys/arch/i386/compile/GENERIC
cpu0: AMD Athlon(tm) XP 2600+ ("AuthenticAMD" 686-class, 512KB L2 cache) 1.92 GHz
cpu0: FPU,V86,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE
real mem  = 1610104832 (1535MB)
avail mem = 1547571200 (1475MB)
mainbus0 at root
bios0 at mainbus0: AT/286+ BIOS, date 11/22/04, BIOS32 rev. 0 @ 0xfb3f0, SMBIOS rev. 2.2 @ 0xf0800 (37 entries)
bios0: vendor Phoenix Technologies, LTD version "6.00 PG" date 11/22/2004
bios0: http://www.abit.com.tw/ NF7-S/NF7,NF7-V (nVidia-nForce2)
apm0 at bios0: Power Management spec V1.2 (slowidle)
apm0: AC on, battery charge unknown
acpi at bios0 function 0x0 not configured
pcibios0 at bios0: rev 2.1 @ 0xf0000/0xdf84
pcibios0: PCI IRQ Routing Table rev 1.0 @ 0xfdeb0/208 (11 entries)
pcibios0: PCI Exclusive IRQs: 10 11 12 14 15
pcibios0: no compatible PCI ICU found
pcibios0: Warning, unable to fix up PCI interrupt routing
pcibios0: PCI bus #2 is the last bus
bios0: ROM list: 0xc0000/0x9800 0xcc000/0x5000 0xd1000/0x1000
cpu0 at mainbus0: (uniprocessor)
pci0 at mainbus0 bus 0: configuration mode 1 (bios)
pchb0 at pci0 dev 0 function 0 "NVIDIA nForce2 PCI" rev 0xc1
agp at pchb0 not configured
"NVIDIA nForce2" rev 0xc1 at pci0 dev 0 function 1 not configured
"NVIDIA nForce2" rev 0xc1 at pci0 dev 0 function 2 not configured
"NVIDIA nForce2" rev 0xc1 at pci0 dev 0 function 3 not configured
"NVIDIA nForce2" rev 0xc1 at pci0 dev 0 function 4 not configured
"NVIDIA nForce2" rev 0xc1 at pci0 dev 0 function 5 not configured
pcib0 at pci0 dev 1 function 0 "NVIDIA nForce2 ISA" rev 0xa4
nviic0 at pci0 dev 1 function 1 "NVIDIA nForce2 SMBus" rev 0xa2
iic0 at nviic0
iic0: addr 0x4e 01=08 02=01 03=01 04=01 05=80 06=0b 07=00 08=00 09=00 0a=eb 0b=00 0c=00 0d=00 0e=00 0f=00 3e=08 48=08 4a=08 4e=08 f0=00 f1=00 f2=00 f3=00 f4=00 f5=00 f6=00 f7=00 f8=00 f9=00 fa=00 fb=00 fc=00 fd=00 fe=08 ff=00 words 00=28ff 01=08ff 02=01ff 03=01ff 04=01ff 05=80ff 06=0bff 07=00ff
spdmem0 at iic0 addr 0x50: 512MB DDR SDRAM non-parity PC3200CL3.0
spdmem1 at iic0 addr 0x51: 512MB DDR SDRAM non-parity PC2700CL2.5
spdmem2 at iic0 addr 0x52: 512MB DDR SDRAM non-parity PC3200CL2.5
iic1 at nviic0
ppb0 at pci0 dev 8 function 0 "NVIDIA nForce2 PCI-PCI" rev 0xa3
pci1 at ppb0 bus 1
pciide0 at pci1 dev 8 function 0 "Promise PDC40718" rev 0x02: DMA
wd0 at pciide0 channel 0 drive 0: <SAMSUNG HD753LJ>
wd0: 16-sector PIO, LBA48, 715404MB, 1465149168 sectors
wd0(pciide0:0:0): using BIOS timings, Ultra-DMA mode 7
wd1 at pciide0 channel 1 drive 0: <ST31500341AS>
wd1: 16-sector PIO, LBA48, 1430799MB, 2930277168 sectors
wd1(pciide0:1:0): using BIOS timings, Ultra-DMA mode 6
wd2 at pciide0 channel 2 drive 0: <SAMSUNG HD753LJ>
wd2: 16-sector PIO, LBA48, 715404MB, 1465149168 sectors
wd2(pciide0:2:0): using BIOS timings, Ultra-DMA mode 7
wd3 at pciide0 channel 3 drive 0: <SAMSUNG HD401LJ>
wd3: 16-sector PIO, LBA48, 381554MB, 781422768 sectors
wd3(pciide0:3:0): using BIOS timings, Ultra-DMA mode 7
pciide0: using irq 11 for native-PCI interrupt
em0 at pci1 dev 9 function 0 "Intel PRO/1000GT (82541GI)" rev 0x05: irq 10, address 00:1b:21:14:87:60
pciide1 at pci1 dev 11 function 0 "CMD Technology SiI3112 SATA" rev 0x02: DMA
pciide1: using irq 15 for native-PCI interrupt
pciide1: port 0: device present, speed: 1.5Gb/s
wd4 at pciide1 channel 0 drive 0: <SAMSUNG HD753LJ>
wd4: 16-sector PIO, LBA48, 715404MB, 1465149168 sectors
wd4(pciide1:0:0): using BIOS timings, Ultra-DMA mode 7
pciide1: port 1: device present, speed: 1.5Gb/s
wd5 at pciide1 channel 1 drive 0: <SAMSUNG HD401LJ>
wd5: 16-sector PIO, LBA48, 381554MB, 781422768 sectors
wd5(pciide1:1:0): using BIOS timings, Ultra-DMA mode 7
pciide2 at pci0 dev 9 function 0 "NVIDIA nForce2 IDE" rev 0xa2: DMA, channel 0 configured to compatibility, channel 1 configured to compatibility
pciide2: channel 0 ignored (disabled)
pciide2: channel 1 ignored (disabled)
ppb1 at pci0 dev 30 function 0 "NVIDIA nForce2 AGP" rev 0xc1
pci2 at ppb1 bus 2
vga1 at pci2 dev 0 function 0 "NVIDIA GeForce256 DDR" rev 0x10
wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
isa0 at pcib0
isadma0 at isa0
pckbc0 at isa0 port 0x60/5
pckbd0 at pckbc0 (kbd slot)
pckbc0: using irq 1 for kbd slot
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pcppi0 at isa0 port 0x61
midi0 at pcppi0: <PC speaker>
spkr0 at pcppi0
wbsio0 at isa0 port 0x2e/2: W83627HF rev 0x17
lm1 at wbsio0 port 0x290/8: W83627HF
npx0 at isa0 port 0xf0/16: reported by CPUID; using exception 16
biomask fbfd netmask fffd ttymask ffff
mtrr: Pentium Pro MTRR support
softraid0 at root
root on wd3a swap on wd3b dump on wd3b