记录一次HSDB的使用遇到的问题 No such type.
2024-09-07 20:03:20
univese
Unrecognized command. Try help...
hsdb> universe
Heap Parameters:
Gen 0: eden [0x00000000ff600000,0x00000000ff6bca68,0x00000000ff8b0000) space capacity = 2818048, 27.420114916424417 used
from [0x00000000ff8b0000,0x00000000ff8b0000,0x00000000ff900000) space capacity = 327680, 0.0 used
to [0x00000000ff900000,0x00000000ff900000,0x00000000ff950000) space capacity = 327680, 0.0 usedInvocations: 0 Gen 1: old [0x00000000ff950000,0x00000000ff950000,0x0000000100000000) space capacity = 7012352, 0.0 usedInvocations: 0 hsdb> scanoops 0x00000000ff600000 0x00000000ff950000 Test2
No such type.
hsdb> scanoops 0x00000000ff600000 0x00000000ff950000 com.zyt.test.jvmhsdb.Test2
0x00000000ff6af668 com/zyt/test/jvmhsdb/Test2
0x00000000ff6af688 com/zyt/test/jvmhsdb/Test2
0x00000000ff6af698 com/zyt/test/jvmhsdb/Test2
hsdb>
idea中代码
public class Test {
static Test2 t1 = new Test2();
Test2 t2 = new Test2();
public void fn() throws IOException {
Test2 t3 = new Test2();
System.in.read();
}
} class Test2 { }
Main
public class MainTest {
public static void main(String[] args) throws IOException {
Test test = new Test();
test.fn();
}
}
设置VM参数
-XX:+UseSerialGC -Xmx10m
最重要的是要scanoops的时候加入com.zyt.test.jvmhsdb.Test2,包名否则就报找不到错误
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