etop
(observer)Erlang Top is a tool for presenting information about erlang processes similar to the information presented by "top" in UNIX.
etop
should be started with the provided scripts
etop
and getop
for text based and graphical
presentation respectively. Under Windows the batch files
etop.bat
and getop.bat
can be used.
All interaction with etop
when running the graphical
presentation should happen via the menus. For the text based
presentation the functions described below can be used.
The following configuration parameters exist for etop
.
- node
- The measured node.
Value: atom()
Mandatory - setcookie
- Cookie to use for the etop node - must be the same
as the cookie on the measured node.
Value: atom() - lines
- Number of lines (processes) to display.
Value: integer()
Default: 10 - interval
- The time interval (in seconds) between each update of
the display.
Value: integer()
Default: 5 - accumulate
- If
true
the execution time and reductions are accumulated.
Value: boolean()
Default:false
- sort
- Identifies what information to sort by.
Value:runtime | reductions | memory | msg_q
Default:runtime
(reductions
iftracing=off
) - tracing
etop
uses the erlang trace facility, and thus no other tracing is possible on the measured node whileetop
is running, unless this option is set tooff
. Also helpful if theetop
tracing causes too high load on the measured node. With tracing off, runtime is not measured.
Value:on | off
Default:on
Functions
config(Key,Value) -> Result
Result = ok | {error,Reason}
Key = lines | interval | accumulate | sort
Value = term()
This function is used to change the tool's configuration parameters during runtime. The table above indicates the allowed values for each parameter.
dump(File) -> Result
Result = ok | {error,Reason}
File = string()
This function dumps the current display to a text file.
stop() -> stop
This function terminates etop
.