Sha256: 0256be4976e1461c1adc756c564cf37b4e0abe1b7915a4af62204da9184770f8
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Versions: 18
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Contents
module Appsignal
# Appsignal::GarbageCollectionProfiler wraps Ruby's GC::Profiler to be able
# to track garbage collection time for multiple transactions, while
# constantly clearing GC::Profiler's total_time to make sure it doesn't leak
# memory by keeping garbage collection run samples in memory.
class GarbageCollectionProfiler
def initialize
@total_time = 0
end
# Whenever #total_time is called, the current GC::Profiler.total_time gets
# added to @total_time, after which GC::Profiler.clear is called to prevent
# it from leaking memory. A class-level lock is used to make sure garbage
# collection time is never counted more than once.
#
# Whenever @total_time gets above two billion milliseconds (about 23 days),
# it's reset to make sure the result fits in a signed 32-bit integer.
def total_time
lock.synchronize do
@total_time += (internal_profiler.total_time * 1000).round
internal_profiler.clear
end
if @total_time > 2_000_000_000
@total_time = 0
end
@total_time
end
private
def self.lock
@lock ||= Mutex.new
end
def internal_profiler
GC::Profiler
end
def lock
self.class.lock
end
end
end
Version data entries
18 entries across 18 versions & 1 rubygems