go语言服务端内存持续增长，求解惑！

Question

最近用golang开发了一个socket服务端，主要逻辑就是接收客户端发来的数据解析后存入opentsdb中，但是跑一段时间后发现内存就会增长，而且不会被gc回收，初步判定是由于大量make[]byte导致内存不释放，代码如下，求高人解惑？
funcStartTCP()error{
tcp_addr,_:=net.ResolveTCPAddr("tcp4",tcp_listen)
listener,err:=net.ListenTCP("tcp4",tcp_addr)
iferr!=nil{
returnerr
}
deferlistener.Close()
log.Info("starttcplistenon%s",tcp_listen)
for{
conn,err:=listener.AcceptTCP()
iferr!=nil{
log.Error("accepterror%s",err.Error())
continue
}
log.Info("newsessioncreate%s",conn.RemoteAddr().String())
goHandlerConn(conn)
}
}
funcReadPacket(conn*net.TCPConn)[]byte{
head:=make([]byte,4)
_,err:=io.ReadFull(conn,head)
iferr!=nil{
returnnil
}
size:=binary.BigEndian.Uint32(head)
data:=make([]byte,size)
_,err=io.ReadFull(conn,data)
iferr!=nil{
returnnil
}
returndata
}
funcHandlerConn(conn*net.TCPConn){
addr:=conn.RemoteAddr().String()
deferfunc(){
iferr:=conn.Close();err!=nil{
log.Error("closesessionerror%s",err.Error())
}else{
log.Info("sessionclosed%s",addr)
}
}()
for{
data:=ReadPacket(conn)
iflen(data)==0{
log.Warn("emptydata")
return
}
goHandlerMsg(conn,data,t)
}
}
附pprof信息
(pprof)top
9.92GBof9.93GBtotal(100%)
Dropped359nodes(cum<=0.05GB)
flatflat%sum%cumcum%
9.92GB100%100%9.92GB100%main.ReadPacket
00%100%9.92GB100%main.HandlerConn
00%100%9.92GB100%runtime.goexit
(pprof)listmain.ReadPacket
Total:9.93GB
ROUTINE========================main.ReadPacketin/tmp/td-server/tcp_server.go
9.92GB9.92GB(flat,cum)100%ofTotal
..30:goHandlerConn(conn)
..31:}
..32:}
..33:
..34:funcReadPacket(conn*net.TCPConn)[]byte{
..35:head:=make([]byte,4)
..36:_,err:=io.ReadFull(conn,head)
..37:iferr!=nil{
..38:returnnil
..39:}
..40:size:=binary.BigEndian.Uint32(head)
9.92GB9.92GB41:data:=make([]byte,size)
..42:_,err=io.ReadFull(conn,data)
..43:iferr!=nil{
..44:returnnil
..45:}
..46:returndata
..47:}

Answer 1

后来opentsdb出过一次故障修复后就恢复正常了，内存使用维持在200M上下，pprofheap也稳定在2k左右，而且该现象也无法复现，只能判定是opentsdb的问题而导致内存不释放了。