>> > Recently, processes started to die for reasons unknown, as in >> > >> > pid 20260 (postgres): user write of 118784@0x28052000 at 159088 failed: 14 >> > pid 1872 (cron): user write of 118784@0x2b1e3000 at 30224 failed: 14 >> > >> > 14 is EFAULT as per sys/errno,h >> > - what can be causing it? >> >> first check if filesystem is full. > > Filesystem Size Used Avail Capacity Mounted on > /dev/wd0a 196M 113M 73.6M 61% / > /dev/wd0d 490M 421M 44.2M 90% /usr > /dev/wd0e 1.6G 382M 1.1G 25% /usr/local > /dev/wd0g 48.5M 7.4M 38.7M 16% /var > /dev/wd0h 49.0M 22.8M 23.7M 49% /var/log > /dev/wd0i 49.0M 20.2M 26.4M 43% /var/mail > /dev/wd0j 197M 23.6M 164M 13% /var/mysql > /dev/wd0k 97.8M 39.9M 53.0M 43% /var/postgresql > /dev/wd0l 49.0M 16.3M 30.3M 35% /var/spool > /dev/wd0m 4.9G 3.3G 1.3G 71% /var/www > /dev/wd0n 1005M 34.0K 954M 0% /tmp > /dev/wd0o 5.0G 2.9G 1.8G 61% /home > > Can you please elaborate how a lack of disk space > would result in an EFAULT?
write failed, one problem could be disk is full. > >> how much is swap configured? > > swapctl: no swap devices configured > > The machine doesn't do much, and so far the 128M of RAM was enough. > I will reinstall with a swap partition if it makes a difference - > should lack of swap result in an EFAULT? with low memory machines, you want to load it, and yet don't allow memory to grow with no swap and datasize-cur limits? some of the processes will fail eventually. this is another problem. configure swap to be double the RAM size, or if you insist on loading the machine about 4 times the RAM size. you obviously forgot to or didn't want to configure swap. good luck >> > It usually happens under a stress (the machine is pretty scarse >> > on resources, so 'stress' can be accepting a batch of DNS queries). >> > For example, the postgres EFAULT above happened exactly when a batch >> > of emails arrived. >> > >> > Is this a memory problem? My login.conf limits all classes >> > to datasize-cur=100M. Can this be a memory HW problem?
