Здравствуйте!
# uname -a
OpenBSD forward...... 4.3 GENERIC#698 i386

# sysctl -a | grep hw  
hw.machine=i386
hw.model=Intel Pentium II ("GenuineIntel" 686-class, 512KB L2 cache)
...
...
...
hw.physmem=335048704
hw.usermem=335044608

из ПО (mysql, squid, vsftpd, apache, sams, netams, bind, dhcpd, pf)

#uptime                                                                                                                                                    
1:11PM  up 49 days,  1:38, 1 user, load averages: 2.06, 1.65, 1.49

Такое начинает происходить, когда uptime=>45 (+ - 1-2 дня) дней

load averages:  1.63,  1.57,  1.47                                                                                                                  13:13:25
65 processes:  1 running, 61 idle, 2 zombie, 1 on processor
CPU states:  0.8% user,  0.0% nice,  0.8% system,  0.5% interrupt, 98.0% idle
Memory: Real: 115M/K act/tot  Free: 750M  Swap: 0K/604M used/tot

#vmstat                                                                                                                                                    
procs    memory       page                    disks    traps          cpu
r b w    avm     fre  flt  re  pi  po  fr  sr wd0 cd0  int   sys   cs us sy id
0 4 0 117136  769180 4294967172   0   0   0   0   0   2   0  273 4294967220   96 19  6 75

При нормальном функционировании (uptime<=45 days) Free в top не более 90M.
В чем может быть проблема?