There are multiple hosts/clients. All are mainly windows based. Timestamp is not used as my clients mainly are windows based and in that it tcp timestamp is by defauly disabled.
sysctl is as follows: kernel.shmmax = 68719476736 kernel.shmall = 4294967296 kernel.pid_max=4194303 vm.max_map_count=131072 kernel.sem=250 32000 32 250 net.netfilter.nf_conntrack_generic_timeout = 300 net.netfilter.nf_conntrack_tcp_timeout_syn_sent = 60 net.netfilter.nf_conntrack_tcp_timeout_syn_recv = 30 net.netfilter.nf_conntrack_tcp_timeout_established = 7200 net.netfilter.nf_conntrack_tcp_timeout_fin_wait = 60 net.netfilter.nf_conntrack_tcp_timeout_close_wait = 30 net.netfilter.nf_conntrack_tcp_timeout_last_ack = 30 net.netfilter.nf_conntrack_tcp_timeout_time_wait = 60 net.netfilter.nf_conntrack_tcp_timeout_close = 10 net.netfilter.nf_conntrack_tcp_timeout_max_retrans = 300 net.netfilter.nf_conntrack_tcp_timeout_unacknowledged = 300 net.netfilter.nf_conntrack_udp_timeout = 30 net.netfilter.nf_conntrack_udp_timeout_stream = 180 net.netfilter.nf_conntrack_icmp_timeout = 30 net.netfilter.nf_conntrack_events_retry_timeout = 15 net.core.rmem_max = 8388608 net.core.wmem_max = 8388608 net.ipv4.tcp_tw_reuse=1 net.ipv4.tcp_tw_recycle=1 net.ipv4.tcp_fin_timeout=30 net.ipv4.tcp_keepalive_time=1800 net.ipv4.tcp_keepalive_intvl=60 net.ipv4.tcp_keepalive_probes=20 net.ipv4.tcp_max_syn_backlog=4096 net.ipv4.tcp_syncookies=1 net.ipv4.tcp_sack=1 net.ipv4.tcp_dsack=1 net.ipv4.tcp_window_scaling=1 net.ipv4.tcp_syn_retries=3 net.ipv4.tcp_synack_retries=3 net.ipv4.tcp_retries1=3 net.ipv4.tcp_retries2=15 net.ipv4.ip_local_port_range=1024 65535 net.ipv4.tcp_timestamps=0 net.core.netdev_max_backlog=10000 net.core.somaxconn=100000 net.core.optmem_max=81920 net.netfilter.nf_conntrack_max=524288 net.nf_conntrack_max=524288 net.ipv6.conf.all.disable_ipv6 = 1 fs.file-max=1000000 net.ipv4.tcp_no_metrics_save = 1 net.ipv4.tcp_max_syn_backlog = 10240 net.ipv4.tcp_congestion_control=htcp net.ipv4.tcp_rfc1337 = 1 net.core.netdev_max_backlog = 65536 net.ipv4.tcp_max_tw_buckets = 1440000 net.core.rmem_max = 134217728 net.core.wmem_max = 134217728 On Mon, Aug 21, 2017 at 11:14 PM, Eric Dumazet <eric.duma...@gmail.com> wrote: > On Mon, 2017-08-21 at 10:44 -0700, Eric Dumazet wrote: > >> - Why is timewait not being used ? >> > > s/timewait/timestamps/ > > >
