服务启动后内存不断增加

[lovedachengzi]

Environment

• Server: Dubbo-go, v3.1.1
• Client: Dubbo-go, v3.1.1
• Protocol: Triple
• Registry: Nacos, v2.2.3

Issue description

在k8s中启动服务后发现内存在不断增加，使用pprof工具分析发现github.com/dubbogo/grpc-go/internal/transport.newBufWriter在不断申请内存

Logs

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(pprof) top
Showing nodes accounting for 26335.78kB, 89.55% of 29409.22kB total
Showing top 10 nodes out of 85
      flat  flat%   sum%        cum   cum%
 8714.66kB 29.63% 29.63%  8714.66kB 29.63%  github.com/dubbogo/grpc-go/internal/transport.newBufWriter
 7625.84kB 25.93% 55.56%  7625.84kB 25.93%  golang.org/x/net/webdav.(*memFile).Write
 5809.83kB 19.76% 75.32%  5809.83kB 19.76%  bufio.NewReaderSize
 1024.44kB  3.48% 78.80%  1024.44kB  3.48%  runtime.malg
  574.34kB  1.95% 80.75%   574.34kB  1.95%  dubbo.apache.org/dubbo-go/v3/filter/accesslog.newFilter.func1
  521.37kB  1.77% 82.53%   521.37kB  1.77%  github.com/envoyproxy/go-control-plane/envoy/config/route/v3.init
  519.03kB  1.76% 84.29%   519.03kB  1.76%  github.com/dlclark/regexp2/syntax.init.func1
  516.64kB  1.76% 86.05%   516.64kB  1.76%  runtime.procresize
     515kB  1.75% 87.80%      515kB  1.75%  regexp.makeOnePass.func1
  514.63kB  1.75% 89.55%   514.63kB  1.75%  github.com/go-playground/validator/v10.map.init.7
(pprof) list github.com/dubbogo/grpc-go/internal/transport.newBufWriter
Total: 28.72MB
ROUTINE ======================== github.com/dubbogo/grpc-go/internal/transport.newBufWriter in /data/go/pkg/mod/github.com/dubbogo/[email protected]/internal/transport/http_util.go
    8.51MB     8.51MB (flat, cum) 29.63% of Total
 Error: open /data/go/pkg/mod/github.com/dubbogo/[email protected]/internal/transport/http_util.go: no such file or directory