protect.rapache.memory: protect.rapache.memory

In AnalysisPageServer: A framework for sharing interactive data and plots from R through the web

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.

Value

Nothing

Author(s)

Brad Friedman

AnalysisPageServer documentation built on April 28, 2020, 6:32 p.m.