Hi, We are seeing performance issues with Varnish’s file storage when the storage reaches its capacity and Varnish starts LRU nuking. As soon as varnish begins nuking objects, the number of worker threads(MAIN.threads) starts increasing until it hits the limit(thread_pool_max) and remains pinned on the thread_pool_max. This then leads to incoming requests getting queued.
We are running Varnish with following configuration: Varnish version: 6.1 Storage type: file storage Storage size: 150 Gb Granularity: 4096 Thread_pools: 2 Thread_pool_max: 5000 Nuke_limit: 5000 OS: Centos Linux release 7.5.1804 Can we tune any varnishadm params to optimize the nuking ?
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