Hi,
How did you measure the memory consumption? Did you set -Xmx? Because if
not having -Xmx, Java will use some default based on overall available
memory and with a high amount of available memory, GC will not run and thus
lots of memory may be reported as "used", but actually just not freed
yet...
Dominik.
On Mon, Dec 19, 2016 at 3:26 PM, Jan Kunzmann <jan.ku...@googlemail.com>
wrote:
> Hi,
>
> this is my firtst mail to a mailing list.
>
> I asumed that just copy via streaming would consume only little memory. Why
> do i get 750m ram consumption for a 12m file?
> Is there any way to replace a Sheet in a Workbook without consuming tons of
> memory?
>
> try (OPCPackage pkg = OPCPackage.open (sourceFilename,
> PackageAccess.READ)) {
> PackagePart srcPart = getPackagePart(pkg, sheetName);
> try (OPCPackage dest = OPCPackage.open(destFilename)) {
> PackagePart destPart = getPackagePart(dest, sheetName);
> try (OutputStream os = destPart.getOutputStream();
> InputStream is = srcPart.getInputStream()) {
> byte buf[] = new byte[1024];
> for (int readBytes; (readBytes = is.read(buf)) != -1;
> os.write(buf, 0, readBytes))
> os.flush();
> ;
> }
> }
> }
>
> regards,
> Jan
>
