On Fri, 12 Apr 2024 06:07:31 GMT, Thomas Stuefe <stu...@openjdk.org> wrote:
> I am curious: what is the memory overhead for parallel mode, and (I am not > familiar with the logic) how many threads are involved? Is the number of > thread bounded? > > I ask because, especially for the OnOOM handling, we may already be at a > limit memory-wise. Starting to swap will probably be worse than running > single-threaded. Good question. It think it's several MB per each additional thread (1MB output buffer, DumperClassCacheTable - 1031 elements max, element size depends on class field numbers, if HeapDumpGzipLevel is set, some buffers for gzip compressors) Number of threads by default is min of `os::initial_active_processor_count() * 3 / 8` and number of GC workers. ------------- PR Comment: https://git.openjdk.org/jdk/pull/18748#issuecomment-2052312786
