One of my virtual machines hosted at Gandi had an excessive amount of error messages
localhost kernel: ipv6: Neighbour table overflow.
The cause of this error message are the IPv6 router announcements that try to discover and configure the IPv6 neighbourhood. The excessive amount of messages were polluting the logs.
After contacting the Gandi helpdesk they provided insight on the cause of the error message and provided mitigations to prevent these type of errors. I had to update /etc/sysctl.conf with these entries
# Force gc to clean-up quickly net.ipv4.neigh.default.gc_interval = 3600 net.ipv6.neigh.default.gc_interval = 3600 # Set ARP cache entry timeout net.ipv4.neigh.default.gc_stale_time = 3600 net.ipv6.neigh.default.gc_stale_time = 3600 # Setup DNS threshold for arp net.ipv4.neigh.default.gc_thresh3 = 8192 net.ipv4.neigh.default.gc_thresh2 = 4096 net.ipv4.neigh.default.gc_thresh1 = 2048 net.ipv6.neigh.default.gc_thresh3 = 8192 net.ipv6.neigh.default.gc_thresh2 = 4096 net.ipv6.neigh.default.gc_thresh1 = 2048
The configuration file sysctl.conf is a file containing the setting that reads and modifies the attributes of the system kernel.
After updating the configuration file, had to apply them with
Changing the configuration file and applying the settings prevented these error messages from polluting the syslog messages.