Mysql kernel: nf_conntrack version 0.5.0

Mysql kernel: nf_conntrack version 0.5.0

When I want to check the mysql database today, the messages log contains a large number of mysql kernel: nf_conntrack version 0.5.0 connection information. Now I will record the solution and hope to help people who need it. Note: the operating system is CentOS 6.4. The specific parameters are related to the operating system kernel.

Log information:

Oct 30 22:23:02 mysql kernel: ip_tables: (C) 2000-2006 Netfilter Core Team
Oct 30 22:23:02 mysql kernel: nf_conntrack version 0.5.0 (16384 buckets, 65536 max)
Oct 30 22:23:03 mysql kernel: ip_tables: (C) 2000-2006 Netfilter Core Team
Oct 30 22:23:03 mysql kernel: nf_conntrack version 0.5.0 (16384 buckets, 65536 max)
Oct 30 22:25:25 mysql kernel: nf_conntrack version 0.5.0 (16384 buckets, 65536 max)
Oct 30 22:45:43 mysql kernel: ip_tables: (C) 2000-2006 Netfilter Core Team
Oct 30 22:45:44 mysql kernel: ip_tables: (C) 2000-2006 Netfilter Core Team
Oct 30 22:45:44 mysql kernel: nf_conntrack version 0.5.0 (16384 buckets, 65536 max)
Oct 30 22:45:45 mysql kernel: ip_tables: (C) 2000-2006 Netfilter Core Team
Oct 30 22:45:45 mysql kernel: nf_conntrack version 0.5.0 (16384 buckets, 65536 max)
Oct 30 22:49:31 mysql kernel: ip_tables: (C) 2000-2006 Netfilter Core Team
Oct 30 22:49:31 mysql kernel: nf_conntrack version 0.5.0 (16384 buckets, 65536 max)
Oct 30 22:49:32 mysql kernel: ip_tables: (C) 2000-2006 Netfilter Core Team
Oct 30 22:49:32 mysql kernel: nf_conntrack version 0.5.0 (16384 buckets, 65536 max)
Oct 30 22:49:33 mysql kernel: ip_tables: (C) 2000-2006 Netfilter Core Team
Oct 30 22:49:33 mysql kernel: nf_conntrack version 0.5.0 (16384 buckets, 65536 max)

Solution:

1. Load modules

Modprobe nf_conntrack_ipv4

2. Modify Kernel Parameters

Vim/etc/sysctl. conf -- Add the following existing

Net. nf_conntrack_max = 655360

Net. netfilter. nf_conntrack_tcp_timeout_established = 10800

3. The Kernel configuration file takes effect.

Sysctl-p

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