23 lines
1.1 KiB
C++
23 lines
1.1 KiB
C++
$NetBSD: patch-hotspot_src_share_vm_runtime_arguments.cpp,v 1.1 2015/08/27 19:03:59 joerg Exp $
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On 64bit systems, the JVM by default reserves 1GB VA to mangle class
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pointers into a 32bit representation. When the available memory is less
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than 16GB, e.g. due to process limits, scale this down. Even unused
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pages waste system resources and the default limit can stop the JVM
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from starting with ulimit -v 2G.
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--- hotspot/src/share/vm/runtime/arguments.cpp.orig 2015-08-26 15:02:34.000000000 +0000
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+++ hotspot/src/share/vm/runtime/arguments.cpp
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@@ -1808,6 +1808,12 @@ void Arguments::set_heap_size() {
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FLAG_SET_ERGO(uintx, MaxHeapSize, (uintx)reasonable_max);
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}
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+ if (FLAG_IS_DEFAULT(CompressedClassSpaceSize)) {
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+ julong reasonable_max = phys_mem / 16;
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+ reasonable_max = MIN2(reasonable_max, (julong)CompressedClassSpaceSize);
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+ FLAG_SET_ERGO(uintx, CompressedClassSpaceSize, (uintx)reasonable_max);
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+ }
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+
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// If the minimum or initial heap_size have not been set or requested to be set
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// ergonomically, set them accordingly.
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if (InitialHeapSize == 0 || min_heap_size() == 0) {
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