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@@ -299,6 +299,7 @@ function needs_restart(app_root):
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 # The following thread will be responsible for cleaning up idle application
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 # instances, i.e. instances that haven't been used for a while.
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+# This can be disabled per app when setting it's maxIdleTime to 0.
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 thread cleaner:
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   lock.synchronize:
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     done = false
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@@ -312,7 +313,9 @@ thread cleaner:
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       for all container in inactive_apps:
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         app = container.app
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         app_list = apps[app.app_root]
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-				if now - container.last_used > MAX_IDLE_TIME:
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+				# if MAX_IDLE_TIME is 0 we don't clean up the instance,
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+				# giving us the option to persist the app container forever unless it's killed by another app
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+				if (MAX_IDLE_TIME > 0) and (now - container.last_used > MAX_IDLE_TIME):
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           app_list.remove(container.iterator)
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           inactive_apps.remove(iterator for container)
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           app_instance_count[app.app_root]--

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@@ -602,7 +602,7 @@ The default value is '0'.
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 The maximum number of seconds that a Ruby on Rails or Rack application instance
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 may be idle. That is, if an application instance hasn't done anything after
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 the given number of seconds, then it will be shutdown in order to conserve
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-memory.
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+memory. 
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 Decreasing this value means that applications will have to be spawned
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 more often. Since spawning is a relatively slow operation, some visitors may
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@@ -614,6 +614,12 @@ Rails/Rack web page. We recommend a value of `2 * x`, where `x` is the average
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 number of seconds that a visitor spends on a single Rails/Rack web page. But your
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 mileage may vary.
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+When this value is set to 0, application instances will not be shutdown unless 
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+it's really needed, i.e. passenger is out of workers for a given application and 
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+one of the given inactive app instance needs to make place for another app instance,
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+effectively removing the spawn delay.
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+This option value is only recommended if you are a son of RAM.
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+
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 This option may only occur once, in the global server configuration.
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 The default value is '300'.
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@@ -1216,8 +1222,8 @@ active:: The number of application instances that are currently processing
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 requests. This value is always less than or equal to 'count'.
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 inactive:: The number of application instances that are currently *not* processing
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 requests, i.e. are idle. Idle application instances will be shutdown after a while,
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-as can be specified with <<PassengerPoolIdleTime,PassengerPoolIdleTime>>. The value of 'inactive'
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-equals `count - active`.
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+as can be specified with <<PassengerPoolIdleTime,PassengerPoolIdleTime>> unless this
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+value is set to 0. The value of 'inactive' equals `count - active`.
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 The 'applications' section shows each application instance, which directory it belongs
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 to. The 'sessions' field shows how many HTTP client are currently being processed by