October 6, 2010
by Mohan Cheema
0 comments
Many times on RHEL, haproxy is not reliable it gives an errors while connecting to apache backend, at that time it logs the following errors into /var/log/messages
kernel: ip_conntrack: table full, dropping packet
this is related to ip_conntrack kernel module.
If found this error message into /var/log/messages need to apply following steps
August 18, 2010
by Mohan Cheema
0 comments
Linux has a supposedly good memory management feature that will use up any “extra” RAM you have to cache stuff. This section of the memory being used is supposed to be freely available to be taken over by any other process that actually needs it, but unfortunately some Linux distros think that cache memory is too important to move over for anything else that actually needs it.