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linuxÍøÂç²ÎÊýÖ÷ҪλÓÚÏÂÃæÁ½¸öĿ¼ÏÂ:/proc/sys/net/core/ºÍ/proc/sys/net/ipv4/, ÏÂÃæ·Ö±ð¶ÔÕâÁ½¸öĿ¼Ï³£Óõļ¸¸öÍøÂç²ÎÊý×öÏÂ˵Ã÷:
1./proc/sys/net/core/
$ /proc/sys/net/core/somaxconn
listen()µÄĬÈϲÎÊý,¹ÒÆðÇëÇóµÄ×î´óÊýÁ¿.ĬÈÏÊÇ128.¶Ô·±Ã¦µÄ·þÎñÆ÷,Ôö¼Ó¸ÃÖµÓÐÖúÓÚÍøÂçÐÔÄÜ, ¿É²Î¿¼µÄÓÅ»¯Öµ:2048
$ /proc/sys/net/core/wmem_max
×î´ósocketдbuffer,¿É²Î¿¼µÄÓÅ»¯Öµ:131071
$ /proc/sys/net/core/rmem_max
×î´ósocket¶Ábuffer,¿É²Î¿¼µÄÓÅ»¯Öµ:131071
$ /proc/sys/net/core/netdev_max_backlog
½øÈë°üµÄ×î´óÉ豸¶ÓÁÐ.ĬÈÏÊÇ300,¶ÔÖظºÔØ·þÎñÆ÷¶øÑÔ,¸Ãֵ̫µÍ,¿É²Î¿¼µÄÓÅ»¯Öµ:1000
$ /proc/sys/net/core/optmem_max
socket bufferµÄ×î´ó³õʼ»¯Öµ,ĬÈÏ10K,¿É²Î¿¼µÄÓÅ»¯Öµ:20480
2./proc/sys/net/ipv4/
$/proc/sys/net/ipv4/tcp_tw_recycle
¼Ó¿ì»ØÊÕTIME-WAITÌ×½Ó×Ö.0:¹Ø±Õ;1:¿ªÆô
$/proc/sys/net/ipv4/tcp_tw_reuse
¸´ÓÃTIME_WAIT״̬socketµÄ¿ª¹Ø£¬Èç¹û¿ªÆô£¬¿Í»§¶ËÔÚµ÷ÓÃconnectµ÷ÓÃʱ£¬»á×Ô¶¯¸´ÓÃTIME_WAIT״̬µÄ¶Ë¿Ú.0:¹Ø±Õ;1:¿ªÆô
$ /proc/sys/net/ipv4/tcp_wmem
TCPдbuffer,¿É²Î¿¼µÄÓÅ»¯Öµ: 4096 16384 131072
$ /proc/sys/net/ipv4/tcp_rmem
TCP¶Ábuffer,¿É²Î¿¼µÄÓÅ»¯Öµ: 4096 87380 174760
$ /proc/sys/net/ipv4/tcp_mem
ͬÑùÓÐ3¸öÖµ,Òâ˼ÊÇ:
net.ipv4.tcp_mem[0]:µÍÓÚ´ËÖµ,TCPûÓÐÄÚ´æѹÁ¦.
net.ipv4.tcp_mem[1]:ÔÚ´ËÖµÏÂ,½øÈëÄÚ´æѹÁ¦½×¶Î.
net.ipv4.tcp_mem[2]:¸ßÓÚ´ËÖµ,TCP¾Ü¾ø·ÖÅäsocket.
ÉÏÊöÄڴ浥λÊÇÒ³,¶ø²»ÊÇ×Ö½Ú.
¿É²Î¿¼µÄÓÅ»¯ÖµÊÇ:196608 262144 393216
$ /proc/sys/net/ipv4/tcp_max_syn_backlog
½øÈëSYN°üµÄ×î´óÇëÇó¶ÓÁÐ.ĬÈÏ1024.¶ÔÖظºÔØ·þÎñÆ÷¶øÑÔ,¿ÉÊʵ±µ÷¸ß.
$ /proc/sys/net/ipv4/tcp_retries2
TCPʧ°ÜÖØ´«´ÎÊý,ĬÈÏÖµ15,Òâζ×ÅÖØ´«15´Î²Å³¹µ×·ÅÆú.¿É¼õÉÙµ½5,ÒÔ¾¡ÔçÊÍ·ÅÄÚºË×ÊÔ´.
$ /proc/sys/net/ipv4/tcp_keepalive_time
$ /proc/sys/net/ipv4/tcp_keepalive_intvl
$ /proc/sys/net/ipv4/tcp_keepalive_probes
Õâ3¸ö²ÎÊýÓëTCP KeepAliveÓйØ.ĬÈÏÖµÊÇ:
tcp_keepalive_time = 7200 seconds (2 hours)
tcp_keepalive_probes = 9
tcp_keepalive_intvl = 75 seconds
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