java 命令中的选项

Java HotSpot(TM) 64-Bit Server VM (25.192-b12) for bsd-amd64 JRE (1.8.0_192-b12), built on Oct 6 2018 09:36:52 by "java_re" with gcc 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2336.11.00) Memory: 4k page, physical 16777216k(19984k free) /proc/meminfo: CommandLine flags: -XX:InitialHeapSize=10485760 -XX:MaxHeapSize=10485760 -XX:+PrintCommandLineFlags -XX:+PrintGC -XX:+PrintGCDateStamps -XX:+PrintGCDetails -XX:+PrintGCTimeStamps -XX:+UseCompressedClassPointers -XX:+UseCompressedOops -XX:+UseParallelGC 2022-11-13T13:27:03.348-0800: 0.108: [GC (Allocation Failure) --[PSYoungGen: 1466K->1466K(2560K)] 7610K->7610K(9728K), 0.0048048 secs] [Times: user=0.01 sys=0.01, real=0.01 secs] 2022-11-13T13:27:03.353-0800: 0.113: [Full GC (Ergonomics) [PSYoungGen: 1466K->1288K(2560K)] [ParOldGen: 6144K->6144K(7168K)] 7610K->7432K(9728K), [Metaspace: 2475K->2475K(1056768K)], 0.0024963 secs] [Times: user=0.01 sys=0.00, real=0.00 secs] 2022-11-13T13:27:03.355-0800: 0.116: [GC (Allocation Failure) --[PSYoungGen: 1288K->1288K(2560K)] 7432K->7440K(9728K), 0.0005330 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] 2022-11-13T13:27:03.356-0800: 0.116: [Full GC (Allocation Failure) [PSYoungGen: 1288K->1276K(2560K)] [ParOldGen: 6152K->6144K(7168K)] 7440K->7420K(9728K), [Metaspace: 2475K->2475K(1056768K)], 0.0018582 secs] [Times: user=0.00 sys=0.00, real=0.00 secs] Heap PSYoungGen total 2560K, used 1358K [0x00000007bfd00000, 0x00000007c0000000, 0x00000007c0000000) eden space 2048K, 66% used [0x00000007bfd00000,0x00000007bfe53bb8,0x00000007bff00000) from space 512K, 0% used [0x00000007bff80000,0x00000007bff80000,0x00000007c0000000) to space 512K, 0% used [0x00000007bff00000,0x00000007bff00000,0x00000007bff80000) ParOldGen total 7168K, used 6144K [0x00000007bf600000, 0x00000007bfd00000, 0x00000007bfd00000) object space 7168K, 85% used [0x00000007bf600000,0x00000007bfc000e8,0x00000007bfd00000) Metaspace used 2506K, capacity 4486K, committed 4864K, reserved 1056768K class space used 269K, capacity 386K, committed 512K, reserved 1048576K