namespace :cache do namespace :clear do REDIS_CLEAR_BATCH_SIZE = 1000 # There seems to be no speedup when pushing beyond 1,000 REDIS_SCAN_START_STOP = '0'.freeze # Magic value, see http://redis.io/commands/scan desc "GitLab | Cache | Clear redis cache" task redis: :environment do Gitlab::Redis::Cache.with do |redis| cache_key_pattern = %W[#{Gitlab::Redis::Cache::CACHE_NAMESPACE}* projects/*/pipeline_status] cache_key_pattern.each do |match| cursor = REDIS_SCAN_START_STOP loop do cursor, keys = redis.scan( cursor, match: match, count: REDIS_CLEAR_BATCH_SIZE ) redis.del(*keys) if keys.any? break if cursor == REDIS_SCAN_START_STOP end end end end task all: [:redis] end task clear: 'cache:clear:redis' end