NAME

       health-check - a tool to measure system events.

SYNOPSIS

       health-check [options] [command [options]]

DESCRIPTION

       Health-check  monitors  a  process  and optionally their child processes and threads for a
       given amount of time.  At the end of the monitoring it will display  the  CPU  time  used,
       wakeup  events  generated  and  I/O  operations of the given processes.  It can be used to
       diagnose unhealthy badly behaving processes.

OPTIONS

       health-check options are as follow:

       -h     Show help

       -b     Brief (terse) output for quick overview.

       -c     Find and monitor all child and threads of a given set of processes. This option  is
              only useful when attaching to already running processes using the -p option.

       -d     Specify  analysis duration in seconds. Default is 60 seconds.  A duration of 0 will
              make health-check run forever, or until the monitored process exits.

       -f     Follow fork, vfork and clone system calls.

       -p pid[,pid]
              Specify which processes to analyse. Can be process ID or process name.

       -r     Resolve IP addresses, this can take some time, hence it is an opt-in feature.

       -m max Specify  maximum  number  of  timeout  blocking  system  calls  are  logged  before
              completing.  This  is  useful  with  very  busy processes that can generate tens of
              thousands of ptrace events that have to be logged by health-check. The default is 1
              million.

       -o logfile
              Specify  output  log file to export JSON formatted results.  The resulting data can
              be then easily imported and analysed using JSON parsing tools.

       -u username
              Run command as the specified user.  This cannot be used with the -p option.

       -v verbose
              Enable verbose mode (currently just for -W wakelock option).  Not  compatible  with
              the -b brief option.

       -w monitor wakelock count
              This  uses  fnotify  to  count the number of wakelock lock/unlocks. Lightweight and
              simple wakelock monitoring.

       -W monitor wakelock usage
              This does deeper system call inspection to monitor wakelock usage and uses up  more
              run time processing to perform the inspection.

AUTHOR

       health-check was written by Colin King <colin.king@canonical.com>

       This  manual  page  was  written  by Colin King <colin.king@canonical.com>, for the Ubuntu
       project (but may be used by others).

                                         January 28, 2014                         HEALTH-CHECK(8)