写的一个定时删除文件的服务,结果无缘无故被系统杀死了。
dmesg
[1700172.849656] Out of memory: Kill process 1195 (SliceDyson) score 730 or sacrifice child [1700172.849665] Killed process 1195 (SliceDyson) total-vm:13314968kB, anon-rss:8693980kB, file-rss:116kB
确定是内存泄露造成的。
使用pprof分析造成内存泄露的原因
准备工作
One thing you can do is to compare 2 heap pprofs. You can do it like this: Extract a heap profile heap0.pprof Add some load to the application Extract another heap profile heap1.pprof Compare them with go tool pprof -base heap0.pprof <bin> heap1.pprof This way you can see exactly what is increasing over time.
分析
.pprof
$ go tool pprof 120.pprof Type: inuse_space Time: Mar 6, 2019 at 9:27pm (CST) Entering interactive mode (type "help" for commands, "o" for options) (pprof) top Showing nodes accounting for 603.20MB, 99.67% of 605.20MB total Dropped 1 node (cum <= 3.03MB) flat flat% sum% cum cum% 603.20MB 99.67% 99.67% 605.20MB 100% main.main 0 0% 99.67% 605.20MB 100% runtime.main (pprof) ^C $ go tool pprof 240.pprof Type: inuse_space Time: Mar 6, 2019 at 11:42pm (CST) Entering interactive mode (type "help" for commands, "o" for options) (pprof) top Showing nodes accounting for 2.81GB, 99.86% of 2.81GB total Dropped 6 nodes (cum <= 0.01GB) flat flat% sum% cum cum% 2.81GB 99.86% 99.86% 2.81GB 100% main.main 0 0% 99.86% 2.81GB 100% runtime.main
- 分析各个函数的占比情况
File: SliceDyson Type: inuse_objects Time: Mar 7, 2019 at 2:52pm (CST) Entering interactive mode (type "help" for commands, "o" for options) (pprof) web (pprof) top Showing nodes accounting for 6810, 100% of 6810 total flat flat% sum% cum cum% 6554 96.24% 96.24% 6554 96.24% main.GetXMLFiles 256 3.76% 100% 256 3.76% vendor/golang_org/x/net/http2/hpack.addDecoderNode 0 0% 100% 256 3.76% main.init 0 0% 100% 6554 96.24% main.main 0 0% 100% 256 3.76% net/http.init 0 0% 100% 6810 100% runtime.main 0 0% 100% 256 3.76% vendor/golang_org/x/net/http2/hpack.init 0 0% 100% 256 3.76% vendor/golang_org/x/net/http2/hpack.init.0
GetXMLFiles
var xmlFilesPath []string var LoopGetXmlFilesPath []string var AllTasks []string var tasks []*Task for _, RootPath := range ParseStorageINI(StorageINIPath) { xmlFilesPath = GetXMLFiles(RootPath) for _, xmlFilesPath_str := range xmlFilesPath { LoopGetXmlFilesPath = append(LoopGetXmlFilesPath, xmlFilesPath_str) } }
解决
xmlFilesPathfor range