thanks Kit. in my setup ATS gradually consumes the ram disk , and eventually is it fully used. is that expected ?
Shu Kit Chan wrote > I have been using tmpfs as ram disk for ATS disk cache setup in > storage.config. > And it is running fine for me. > It do can get swapped out so i have to monitor my memory consumption > very closely all the time. > > Kit > > On Tue, Dec 5, 2017 at 6:59 AM, ezko < > erez.koler@ > > wrote: >> Hi. >> I'm trying to optimize ATS reverse proxy configuration. >> My origin is serving live HLS so all objects are short term lived. >> >> My typical HLS live channel has 4 profiles (0.2Mbit , 0.6 Mbit , 1.2Mbit >> and >> 2Mbit). >> The playlist has 15 segments , each 4 seconds in length. So the total >> memory >> needed to cache one HLS channel is at worst (0.2+0.6+1.2+2) * 4 * 15 = 30 >> Mbytes + a few more bytes for the playlist (i'm using header_rewite >> plugin >> with READ_RESPONSE_HDR_HOOK (thanks to Miles Libbey) to set the max-age >> for >> the segments to 60 seconds , so hopefully ATS will evict old segments in >> step with the playlist sliding window) >> >> Anyway ideally I would like ATS to use RAM cache only , but i understand >> that's currently not an option with ATS , so RAM disk is the best >> alternative. >> >> Should i use ATS cache ram (proxy.config.cache.ram_cache.size) , and if >> yes >> what size should i set ? >> How does ATS prevent its own cache ram from being swapped to disk ? >> >> For the cache file in storage.config , what type of ram disk should i use >> ? >> tmpfs or ramfs ? >> tmpfs seems more controlled , but it could be swapped out. >> >> thanks in advance. >> >> >> >> -- >> Sent from: http://apache-traffic-server.24303.n7.nabble.com/ -- Sent from: http://apache-traffic-server.24303.n7.nabble.com/
