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标题: 故障： TCP time wait bucket table overflow [打印本页]
作者: 璐璐    时间: 2019-11-8 11:07
标题: 故障： TCP time wait bucket table overflow
故障： TCP: time wait bucket table overflow
现象：TOMCAT服务器对外提供的服务，高峰时出现间歇性的问题，性能尖刺现象明显。
vi /var/log/messages 中出现很多 TCP: time wait bucket table overflow
查看配置
  1. <span style='font-family: 宋体; font-size: 10.5pt; mso-spacerun: "yes"; mso-font-kerning: 1.0000pt; mso-bidi-font-family: "Times New Roman"; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri;'><p style="margin: 0pt;"><span style='font-family: 宋体; font-size: 10.5pt; mso-spacerun: "yes"; mso-font-kerning: 1.0000pt; mso-bidi-font-family: "Times New Roman"; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri;'> </span></p><p style="margin: 0pt;"><span style='font-family: 宋体; font-size: 10.5pt; mso-spacerun: "yes"; mso-font-kerning: 1.0000pt; mso-bidi-font-family: "Times New Roman"; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri;'> cat /proc/sys/net/ipv4/tcp_max_tw_buckets</span></p><p style="margin: 0pt;"><span style='font-family: 宋体; font-size: 10.5pt; mso-spacerun: "yes"; mso-font-kerning: 1.0000pt; mso-bidi-font-family: "Times New Roman"; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri;'> </span></p><p style="margin: 0pt;"><span style='font-family: 宋体; font-size: 10.5pt; mso-spacerun: "yes"; mso-font-kerning: 1.0000pt; mso-bidi-font-family: "Times New Roman"; mso-ascii-font-family: Calibri; mso-hansi-font-family: Calibri;'>3000</span></p></span><p style="margin: 0pt;">
  2. </p>
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修改
  1. echo 20000 > /proc/sys/net/ipv4/tcp_max_tw_buckets
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以上是临时解决，重启后会丢这个配置。所以还要写到配置文件中
修改配置文件：
  1. vi /etc/sysctl.conf



  5. net.ipv4.tcp_max_tw_buckets = 20000
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