OpenJDK 1.22 · jdk.internal.platform.CgroupV1Metrics

Method Summary

Modifier and Type	Method and Description
public double	Returns: Memory pressure or 0 if not enabled or -1 if metric is not available. getCpuSetMemoryPressure() Returns the (attempts per second * 1000), if enabled, that the operating system tries to satisfy a memory request for any process in the current Isolation Group when no free memory is readily available.
public long	Returns: The number of exceeded requests or -1 if metric is not available. getKernelMemoryFailCount() Returns the number of times that kernel memory requests in the Isolation Group have exceeded the kernel memory limit.
public long	Returns: The largest amount of memory in bytes or -1 if this metric is not available. getKernelMemoryMaxUsage() Returns the largest amount of kernel physical memory, in bytes, that have been allocated in the Isolation Group.
public long	Returns: The amount of memory in bytes allocated or -1 if this metric is not available. getKernelMemoryUsage() Returns the amount of kernel physical memory, in bytes, that is currently allocated in the current Isolation Group.
public long	Returns: The number of exceeded requests or -1 if the metric is not available. getMemoryAndSwapFailCount() Returns the number of times that user memory requests in the Isolation Group have exceeded the memory + swap limit.
public long	Returns: The largest amount of memory in bytes or -1 if this metric is not available. getMemoryAndSwapMaxUsage() Returns the largest amount of physical memory and swap space, in bytes, that have been allocated in the Isolation Group.
public long	Returns: The largest amount of memory in bytes or -1 if this metric is not available. Returns -2 if this metric is not supported. getMemoryMaxUsage() Returns the largest amount of physical memory, in bytes, that have been allocated in the Isolation Group.
public long	Returns: The number of exceeded requests or -1 if the metric is not available. getTcpMemoryFailCount() Returns the number of times that networking memory requests in the Isolation Group have exceeded the kernel memory limit.
public long	Returns: The largest amount of memory in bytes or -1 if this metric is not available. getTcpMemoryMaxUsage() Returns the largest amount of networking physical memory, in bytes, that have been allocated in the Isolation Group.
public Boolean	Returns: true if support is available and enabled. false otherwise. isCpuSetMemoryPressureEnabled() Returns the state of the memory pressure detection support.
public Boolean	Returns: Returns true if operating system will terminate processes in the Isolation Group that exceed the amount of available memory, otherwise false. null will be returned if this capability is not available on the current operating system. isMemoryOOMKillEnabled() Returns the state of the Operating System Out of Memory termination policy.

Method Detail

getCpuSetMemoryPressure back to summary

getCpuSetMemoryPressure	back to summary
public double getCpuSetMemoryPressure() Returns the (attempts per second * 1000), if enabled, that the operating system tries to satisfy a memory request for any process in the current Isolation Group when no free memory is readily available. Use `isCpuSetMemoryPressureEnabled()` to determine if this support is enabled. Returns:double Memory pressure or 0 if not enabled or -1 if metric is not available.

public double getCpuSetMemoryPressure()

Returns the (attempts per second * 1000), if enabled, that the operating system tries to satisfy a memory request for any process in the current Isolation Group when no free memory is readily available. Use isCpuSetMemoryPressureEnabled() to determine if this support is enabled.

Returns:double: Memory pressure or 0 if not enabled or -1 if metric is not available.

getKernelMemoryFailCount	back to summary
public long getKernelMemoryFailCount() Returns the number of times that kernel memory requests in the Isolation Group have exceeded the kernel memory limit. Returns:long The number of exceeded requests or -1 if metric is not available.

getKernelMemoryFailCount

back to summary

public long getKernelMemoryFailCount()

Returns the number of times that kernel memory requests in the Isolation Group have exceeded the kernel memory limit.

Returns:long: The number of exceeded requests or -1 if metric is not available.

getKernelMemoryMaxUsage	back to summary
public long getKernelMemoryMaxUsage() Returns the largest amount of kernel physical memory, in bytes, that have been allocated in the Isolation Group. Returns:long The largest amount of memory in bytes or -1 if this metric is not available.

getKernelMemoryMaxUsage

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public long getKernelMemoryMaxUsage()

Returns the largest amount of kernel physical memory, in bytes, that have been allocated in the Isolation Group.

Returns:long: The largest amount of memory in bytes or -1 if this metric is not available.

getKernelMemoryUsage	back to summary
public long getKernelMemoryUsage() Returns the amount of kernel physical memory, in bytes, that is currently allocated in the current Isolation Group. Returns:long The amount of memory in bytes allocated or -1 if this metric is not available.

getKernelMemoryUsage

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public long getKernelMemoryUsage()

Returns the amount of kernel physical memory, in bytes, that is currently allocated in the current Isolation Group.

Returns:long: The amount of memory in bytes allocated or -1 if this metric is not available.

getMemoryAndSwapFailCount	back to summary
public long getMemoryAndSwapFailCount() Returns the number of times that user memory requests in the Isolation Group have exceeded the memory + swap limit. Returns:long The number of exceeded requests or -1 if the metric is not available.

getMemoryAndSwapFailCount

back to summary

public long getMemoryAndSwapFailCount()

Returns the number of times that user memory requests in the Isolation Group have exceeded the memory + swap limit.

Returns:long: The number of exceeded requests or -1 if the metric is not available.

getMemoryAndSwapMaxUsage	back to summary
public long getMemoryAndSwapMaxUsage() Returns the largest amount of physical memory and swap space, in bytes, that have been allocated in the Isolation Group. Returns:long The largest amount of memory in bytes or -1 if this metric is not available.

getMemoryAndSwapMaxUsage

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public long getMemoryAndSwapMaxUsage()

Returns the largest amount of physical memory and swap space, in bytes, that have been allocated in the Isolation Group.

Returns:long: The largest amount of memory in bytes or -1 if this metric is not available.

getMemoryMaxUsage	back to summary
public long getMemoryMaxUsage() Returns the largest amount of physical memory, in bytes, that have been allocated in the Isolation Group. Returns:long The largest amount of memory in bytes or -1 if this metric is not available. Returns -2 if this metric is not supported.

getMemoryMaxUsage

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public long getMemoryMaxUsage()

Returns the largest amount of physical memory, in bytes, that have been allocated in the Isolation Group.

Returns:long: The largest amount of memory in bytes or -1 if this metric is not available. Returns -2 if this metric is not supported.

getTcpMemoryFailCount	back to summary
public long getTcpMemoryFailCount() Returns the number of times that networking memory requests in the Isolation Group have exceeded the kernel memory limit. Returns:long The number of exceeded requests or -1 if the metric is not available.

getTcpMemoryFailCount

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public long getTcpMemoryFailCount()

Returns the number of times that networking memory requests in the Isolation Group have exceeded the kernel memory limit.

Returns:long: The number of exceeded requests or -1 if the metric is not available.

getTcpMemoryMaxUsage	back to summary
public long getTcpMemoryMaxUsage() Returns the largest amount of networking physical memory, in bytes, that have been allocated in the Isolation Group. Returns:long The largest amount of memory in bytes or -1 if this metric is not available.

getTcpMemoryMaxUsage

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public long getTcpMemoryMaxUsage()

Returns the largest amount of networking physical memory, in bytes, that have been allocated in the Isolation Group.

Returns:long: The largest amount of memory in bytes or -1 if this metric is not available.

isCpuSetMemoryPressureEnabled	back to summary
public Boolean isCpuSetMemoryPressureEnabled() Returns the state of the memory pressure detection support. Returns:Boolean true if support is available and enabled. false otherwise.

isCpuSetMemoryPressureEnabled

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public Boolean isCpuSetMemoryPressureEnabled()

Returns the state of the memory pressure detection support.

Returns:Boolean: true if support is available and enabled. false otherwise.

isMemoryOOMKillEnabled	back to summary
public Boolean isMemoryOOMKillEnabled() Returns the state of the Operating System Out of Memory termination policy. Returns:Boolean Returns true if operating system will terminate processes in the Isolation Group that exceed the amount of available memory, otherwise false. null will be returned if this capability is not available on the current operating system.

isMemoryOOMKillEnabled

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public Boolean isMemoryOOMKillEnabled()

Returns the state of the Operating System Out of Memory termination policy.

Returns:Boolean: Returns true if operating system will terminate processes in the Isolation Group that exceed the amount of available memory, otherwise false. null will be returned if this capability is not available on the current operating system.

public Interface CgroupV1Metrics

Method Summary

Method Detail