As I need an image that runs longer than 24 hours I'm looking at some stuff and wonder. Can anybody explain me the rationale for a code like this maxExternalSemaphores: aSize "This method should never be called as result of normal program execution. If it is however, handle it differently: - In development, signal an error to promt user to set a bigger size at startup immediately. - In production, accept the cost of potentially unhandled interrupts, but log the action for later review. See comment in maxExternalObjectsSilently: why this behaviour is desirable, " "Can't find a place where development/production is decided. Suggest Smalltalk image inProduction, but use an overridable temp meanwhile. " | inProduction | self maxExternalSemaphores ifNil: [^ 0]. inProduction := false. ^ inProduction ifTrue: [self maxExternalSemaphoresSilently: aSize. self crTrace: 'WARNING: Had to increase size of semaphore signal handling table due to many external objects concurrently in use'; crTrace: 'You should increase this size at startup using #maxExternalObjectsSilently:'; crTrace: 'Current table size: ' , self maxExternalSemaphores printString] ifFalse: ["Smalltalk image" self error: 'Not enough space for external objects, set a larger size at startup!' "Smalltalk image"] I have reported this once but got no feedback so I like to have a few opinions. The report is here: https://pharo.fogbugz.com/f/cases/10839/ Norbert