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.
