Integrated: 8320215: HeapDumper can use DumpWriter buffer during merge

[Alex Menkov]

On Fri, 19 Apr 2024 00:10:12 GMT, Alex Menkov <amenkov at openjdk.org> wrote:

> The fix updates HeapMerger to use writer buffer (no need to copy memory, also writer buffer is 1MB instead of 4KB).
> Additionally fixed small issue in FileWriter (looks like `ssize_t` instead of `size_t` is a typo, the argument should be unsigned)
> 
> Testing: all HeapDump-related tests on Oracle supported platforms

This pull request has now been integrated.

Changeset: e4fbb15c
Author:    Alex Menkov <amenkov at openjdk.org>
URL:       https://git.openjdk.org/jdk/commit/e4fbb15c6a7b18f1ec66176080404818d3871194
Stats:     22 lines in 3 files changed: 9 ins; 4 del; 9 mod

8320215: HeapDumper can use DumpWriter buffer during merge

Reviewed-by: sspitsyn, yyang

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PR: https://git.openjdk.org/jdk/pull/18850