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PERF: slow down optimizing images per host

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Sam 2018-01-24 08:53:17 +11:00
parent bfd052a317
commit c42bb94362
1 changed files with 3 additions and 3 deletions
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6
app/models/optimized_image.rb
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@ -10,10 +10,10 @@ class OptimizedImage < ActiveRecord::Base
VERSION = 1 VERSION = 1
def self.lock(upload_id, width, height) def self.lock(upload_id, width, height)
# note, the extra lock here ensures we only optimize one image per process @hostname ||= `hostname`.strip rescue "unknown"
# note, the extra lock here ensures we only optimize one image per machine
# this can very easily lead to runaway CPU so slowing it down is beneficial # this can very easily lead to runaway CPU so slowing it down is beneficial
@mutex ||= Mutex.new DistributedMutex.synchronize("optimized_image_host_#{@hostname}") do
@mutex.synchronize do
DistributedMutex.synchronize("optimized_image_#{upload_id}_#{width}_#{height}") do DistributedMutex.synchronize("optimized_image_#{upload_id}_#{width}_#{height}") do
yield yield
end end