Module openj9.sharedclasses

Package com.ibm.oti.shared

Class SharedClassStatistics

java.lang.Object

com.ibm.oti.shared.SharedClassStatistics

public class SharedClassStatistics
extends Object

SharedClassStatistics provides static functions that report basic cache statistics.

Constructor Summary

Constructors

Constructor	Description
SharedClassStatistics()	Deprecated.

Method Summary

Modifier and Type	Method	Description
static String	cacheDir()	Returns the cache directory.
static String	cacheName()	Returns the cache name.
static String	cachePath()	Returns the full cache path.
static long	freeSpaceBytes()	Returns the free space of the shared cache that the JVM is currently connected to.
static long	maxAotBytes()	Returns the maximum space allowed for AOT data of the cache that the JVM is currently connected to.
static long	maxJitDataBytes()	Returns the maximum space allowed for JIT data of the cache that the JVM is currently connected to.
static long	maxSizeBytes()	Returns the size of the shared cache that the JVM is currently connected to.
static long	minAotBytes()	Returns the minimum space reserved for AOT data of the cache that the JVM is currently connected to.
static long	minJitDataBytes()	Returns the minimum space reserved for JIT data of the cache that the JVM is currently connected to.
static long	numberAttached()	Returns the SysV shmem nattch value for a non-persistent top level cache.
static long	softmxBytes()	Returns the soft limit in bytes for the available space of the cache that the JVM is currently connected to.

Methods declared in class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

SharedClassStatistics

@Deprecated
public SharedClassStatistics()

Deprecated.

Constructs a new instance of this class.

Method Details

maxSizeBytes

public static long maxSizeBytes()

Returns the size of the shared cache that the JVM is currently connected to.

Returns:

the total size in bytes

freeSpaceBytes

public static long freeSpaceBytes()

Returns the free space of the shared cache that the JVM is currently connected to.

Returns:

the free space in bytes

softmxBytes

public static long softmxBytes()

Returns the soft limit in bytes for the available space of the cache that the JVM is currently connected to.

Returns:

the soft max size or cache size in bytes if it is not set

minAotBytes

public static long minAotBytes()

Returns the minimum space reserved for AOT data of the cache that the JVM is currently connected to.

Returns:

the minimum shared classes cache space reserved for AOT data in bytes or -1 if it is not set

maxAotBytes

public static long maxAotBytes()

Returns the maximum space allowed for AOT data of the cache that the JVM is currently connected to.

Returns:

the maximum shared classes cache space allowed for AOT data in bytes or -1 if it is not set

minJitDataBytes

public static long minJitDataBytes()

Returns the minimum space reserved for JIT data of the cache that the JVM is currently connected to.

Returns:

the minimum shared classes cache space reserved for JIT data in bytes or -1 if it is not set

maxJitDataBytes

public static long maxJitDataBytes()

Returns the maximum space allowed for JIT data of the cache that the JVM is currently connected to.

Returns:

the maximum shared classes cache space allowed for JIT data in bytes or -1 if it is not set

numberAttached

public static long numberAttached()

Returns the SysV shmem nattch value for a non-persistent top level cache.

On Windows or for persistent caches, -1 is returned. Depending on the platform and OS, such as z/OS, the value indicates the number of JVMs attached to the cache.

Returns:

the SysV shmem nattch value for a top level non-persistent cache, or -1 if it cannot be determined

cachePath

public static String cachePath()

Returns the full cache path.

Returns:

the full cache path, or NULL if it cannot be determined

cacheName

public static String cacheName()

Returns the cache name.

Returns:

the cache name, or NULL if it cannot be determined

cacheDir

public static String cacheDir()

Returns the cache directory.

Returns:

the cache directory, or NULL if it cannot be determined