If the pool is a sync.Pool:
Any item stored in the Pool may be removed automatically at any time without
18 // notification. If the Pool holds the only reference when this
happens, the
19 // item might be deallocated.
So placing an object in the pool does not guarantee it won’t be collected -
causing a future allocation.
> On Mar 25, 2020, at 10:22 PM, steve tang <tsg...@gmail.com> wrote:
>
> chunkCrc32Hash := crc32.NewIEEE()
> chunkBuf := bufferpool.GetInstance().Get()
> //回收buffer
> defer bufferpool.GetInstance().Put(chunkBuf)
> writer := io.MultiWriter(chunkBuf, chunkCrc32Hash)
> _, copyErr := io.Copy(writer, chunkResp.RawResponse.Body)
> if copyErr != nil && copyErr != io.EOF {
> logmgr.ErrorLogger(ctx, "fail to write chunk data to crc32 or buffer, req:
> %s, err: %s", originReq.PrettyPrint(), copyErr)
> return false, exception.OEFException(nil, http.StatusInternalServerError,
> CopyChunkError, "internal server exception")
> }
>
> In above codes, it writes chunk data to buffer pool, and the chunk data size
> is 4MB. When I used golang tool pprof to export memory pprof, there about
> 8MB space has been allocated. Could somebody help me why golang allocated
> memory space increases?
>
>
> <20200326-111844.png>
>
>
>
>
>
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> <20200326-111844.png>
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