I find a lot of error log on my proxy server:
Jan 22 22:57:37 streams1 kernel: printk: 1 messages suppressed.
Jan 22 23:00:04 streams1 kernel: printk: 1 messages suppressed.
Jan 22 23:00:09 streams1 kernel: printk: 1 messages suppressed.
Jan 22 23:00:13 streams1 kernel: printk: 3 messages suppressed.
Jan 22 23:00:20 streams1 kernel: printk: 2 messages suppressed.
Jan 22 23:00:25 streams1 kernel: printk: 3 messages suppressed.
Jan 22 23:00:29 streams1 kernel: printk: 2 messages suppressed.
Jan 22 23:00:34 streams1 kernel: printk: 2 messages suppressed.
Jan 22 23:00:45 streams1 kernel: printk: 3 messages suppressed.
It’s normal after I change kernel parameters.
1.ip_conntrack_tcp_timeout
echo 180 > /proc/sys/net/ipv4/netfilter/ip_conntrack_tcp_timeout_established
2. ip_conntrack_max
echo 262144 > /proc/sys/net/ipv4/netfilter/ip_conntrack_max
3.gc_stale_time
echo 120 > /proc/sys/net/ipv4/neigh/default/gc_stale_time
4.gc_thresh1
echo 1024 > /proc/sys/net/ipv4/neigh/default/gc_thresh1
5.gc_thresh2
echo 4096 > /proc/sys/net/ipv4/neigh/default/gc_thresh2
6.gc_thresh3
echo 8192 > /proc/sys/net/ipv4/neigh/default/gc_thresh3
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