Does this happens on tip too? There was a recent CL that modified the code of the nat pool; see
https://go-review.googlesource.com/#/c/30613/ exp. the "Eliminate allocation in divLarge nat pool" part. Il giorno sabato 15 ottobre 2016 16:28:01 UTC+2, Raffaele Di Fazio ha scritto: > > Hi, > I have a web application that over time uses more and more memory. This is > the output of pprof of the heap: > > go tool pprof -alloc_space lushan-server https: > //localhost:8083/debug/pprof/heap > Fetching profile from https://localhost:8083/debug/pprof/heap > Saved profile in /Users/rdifazio/pprof/pprof.lushan-server.localhost: > 8083.alloc_objects.alloc_space.022.pb.gz > Entering interactive mode (type "help" for commands) > (pprof) top > 43.06MB of 67.07MB total (64.20%) > Dropped 4 nodes (cum <= 0.34MB) > Showing top 10 nodes out of 188 (cum >= 1.50MB) > flat flat% sum% cum cum% > 26MB 38.76% 38.76% 26MB 38.76% math/big.putNat > 3MB 4.48% 43.24% 3.50MB 5.22% encoding/json.(*decodeState). > objectInterface > 2.50MB 3.73% 46.97% 2.50MB 3.73% crypto/tls.(*Conn).write > 2MB 2.98% 49.96% 2MB 2.98% crypto/tls.(*block).reserve > 2MB 2.98% 52.94% 10.50MB 15.66% encoding/json.Unmarshal > 1.55MB 2.31% 55.25% 1.55MB 2.31% regexp.(*bitState).reset > 1.50MB 2.24% 57.49% 9.50MB 14.17% github.com/go-openapi/spec.(* > Schema).UnmarshalJSON > 1.50MB 2.24% 59.72% 27.50MB 41.00% math/big.nat.divLarge > 1.50MB 2.24% 61.96% 5.50MB 8.20% math/big.nat.expNN > 1.50MB 2.24% 64.20% 1.50MB 2.24% crypto/sha512.New384 > (pprof) > > > ROUTINE ======================== math/big.putNat in /usr/local/Cellar/go/ > 1.7.1/libexec/src/math/big/nat.go > 26MB 26MB (flat, cum) 38.76% of Total > . . 550: } > . . 551: return z.make(n) > . . 552:} > . . 553: > . . 554:func putNat(x nat) { > 26MB 26MB 555: natPool.Put(x) > . . 556:} > . . 557: > . . 558:var natPool sync.Pool > . . 559: > . . 560:// q = (uIn-r)/v, with 0 <= r < y > > > > The memory allocated in math/big.putNat seems to increase over time, > generating a very high usage of memory for a web applications that is > executing very few requests per second. I wonder why and how I can better > analyze this issue. Please notice that this happens only when serving > HTTPS. > > I'm currently using go 1.7 and the app itself uses the gin web framework. > > Thanks in advance! > > Raffaele > -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
