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Server : Apache/2.4.41 (Ubuntu)
System : Linux cls 5.4.0-216-generic #236-Ubuntu SMP Fri Apr 11 19:53:21 UTC 2025 x86_64
User : iscuser ( 1001)
PHP Version : 7.4.12
Disable Function : shell_exec,pcntl_alarm,pcntl_fork,pcntl_waitpid,pcntl_wait,pcntl_wifexited,pcntl_wifstopped,pcntl_wifsignaled,pcntl_wifcontinued,pcntl_wexitstatus,pcntl_wtermsig,pcntl_wstopsig,pcntl_signal,pcntl_signal_get_handler,pcntl_signal_dispatch,pcntl_get_last_error,pcntl_strerror,pcntl_sigprocmask,pcntl_sigwaitinfo,pcntl_sigtimedwait,pcntl_exec,pcntl_getpriority,pcntl_setpriority,pcntl_async_signals,pcntl_unshare,
Directory :  /usr/lib/netdata/conf.d/health.d/

Upload File :
current_dir [ Writeable ] document_root [ Writeable ]

 

Command :
Current File : //usr/lib/netdata/conf.d/health.d/tcp_mem.conf
#
# check
# http://blog.tsunanet.net/2011/03/out-of-socket-memory.html
#
# We give a warning when TCP is under memory pressure
# and a critical when TCP is 90% of its upper memory limit
#

   alarm: tcp_memory
      on: ipv4.sockstat_tcp_mem
      os: linux
   hosts: *
    calc: ${mem} * 100 / ${tcp_mem_high}
   units: %
   every: 10s
    warn: ${mem} > (($status >= $WARNING  ) ? ( ${tcp_mem_pressure} * 0.8 ) : ( ${tcp_mem_pressure}   ))
    crit: ${mem} > (($status >= $CRITICAL ) ? ( ${tcp_mem_pressure}       ) : ( ${tcp_mem_high} * 0.9 ))
   delay: up 0 down 5m multiplier 1.5 max 1h
    info: the amount of TCP memory as a percentage of its max memory limit
      to: sysadmin

Samx