protect.rapache.memory: protect.rapache.memory
Description
Set up events and handler to turn over memory-bloated worker processes
Usage
protect.rapache.memory(app, max.mb, app.event = "FinishAnalysis", memory.event = "BloatedMemory")
Arguments
app
AnalysisPageRApacheApp
max.mb
Maximum allowed memory usage before triggering turnover.
app.event
Name of event which should trigger this memory check.
Default: "FinishAnalysis".
memory.event
Name of event which excess memory usage should trigger.
Default: "BloatedMemory".
Details
Set up events and handler to turn over memory-bloated worker processes.
When Rapache processes process requests that require large amounts of memory
they don't return the memory to the OS. Eventually it can build up, slowing
down the server when then has to turn to cache. Calling this function
will add a check at each FinishAnalysis which, if the process is using
more memory than the threshold specified by max.mb, delivers
a SIGUSR1 signal to itself. This is a signal to Apache that the process
should be turned over after finish the current request, thus
pruning bloated workers.