Use Memory attributes to create situations that monitor counter information for real and virtual memory. Real memory is allocated in units of pages. Virtual memory may exceed real memory size, causing page traffic as virtual pages are moved between disk and real memory. Memory is a multiple-instance attribute group. You cannot mix these attributes with those of any other multiple-instance attribute group.
% Committed Bytes In Use The ratio of Committed Bytes to the Commit Limit. Committed memory is the physical memory in use for which space has been reserved in the paging file should it need to be written to disk. The commit limit is determined by the size of the paging file. If the paging file is enlarged, commit limit is enlarged, the commit limit increases, and the ratio is reduced. This counter displays the current percentage value only; it is not an average.
Available Bytes The size of the virtual memory currently on the Zeroed, Free and Standby lists. Zeroed and Free memory is ready for use, with Zeroed memory cleared to zeros. Standby memory is memory removed from a process Working Set but still available. Notice that this is an instantaneous count, not an average over the time interval. Note: -1 indicates Unknown, 9223372036854775807 indicates Value_Exceeds_Maximum and -9223372036854775808 indicates Value_Exceeds_Minimum.
Available kBytes The amount of available real memory, in KBs. Note: the value 9223372036854775807 indicates Value_Exceeds_Maximum and the value -9223372036854775808 indicates Value_Exceeds_Minimum.
Available Usage Percentage The percent of bytes of real memory available. Calculated as 100 * (Available Bytes divided by Total Memory Bytes). Note: -1 indicates Unknown, 2147483647 indicates Value_Exceeds_Maximum and -2147483648 indicates Value_Exceeds_Minimum.
Cache Bytes The number of bytes currently in use by the system cache. The system cache is used to buffer data retrieved from disk or LAN. The system cache uses memory not in use by active processes in the computer. Note: -1 indicates Unknown, 9223372036854775807 indicates Value_Exceeds_Maximum and -9223372036854775808 indicates Value_Exceeds_Minimum.
Cache Bytes Peak The maximum number of bytes used by the system cache. The system cache is used to buffer data retrieved from disk or LAN. The system cache uses memory not in use by active processes in the computer. Note: -1 indicates Unknown, 9223372036854775807 indicates Value_Exceeds_Maximum and -9223372036854775808 indicates Value_Exceeds_Minimum.
Cache Faults/sec The average number of cache faults that have occurred on a system per second. Cache faults occur whenever the cache manager does not find a file's page in the immediate cache and must ask the memory manager to locate the page elsewhere in memory or on the disk so that it can be loaded in to the immediate cache. Note: the value 2147483647 indicates Value_Exceeds_Maximum and the value -2147483648 indicates Value_Exceeds_Minimum.
Cache kBytes The amount of cache memory, in KBs, the system is currently using. Note: the value 9223372036854775807 indicates Value_Exceeds_Maximum and the value -9223372036854775808 indicates Value_Exceeds_Minimum.
Cache kBytes Peak The maximum number of KBs the system cache has used since startup. Note: the value 9223372036854775807 indicates Value_Exceeds_Maximum and the value -9223372036854775808 indicates Value_Exceeds_Minimum.
Cache Usage Percentage The percent of bytes of real memory allocated to the system cache. Calculated as 100 * (Cache Bytes divided by Total Memory Bytes). Note: -1 indicates Unknown.
Commit Avail kBytes The number of KBs until the commit limit is reached. Calculated as Commit Limit kB - Committed kBytes. Note: the value 9223372036854775807 indicates Value_Exceeds_Maximum and the value -9223372036854775808 indicates Value_Exceeds_Minimum.
Commit Limit (Bytes) The number of bytes of virtual memory that can be committed on a system without extending the paging files. Commit limit is the size (in bytes) of virtual memory that can be committed without having to extend the paging files. If the paging files can be extended, this is a soft limit. Note: -1 indicates Unknown, 9223372036854775807 indicates Value_Exceeds_Maximum and -9223372036854775808 indicates Value_Exceeds_Minimum.
Commit Limit (Kilobytes) The number of KBs of virtual memory that can be committed on a system without extending the paging files. Note: the value 9223372036854775807 indicates Value_Exceeds_Maximum and the value -9223372036854775808 indicates Value_Exceeds_Minimum.
Committed Bytes The number of bytes of virtual memory that have been committed on a system. Committed memory must have disk storage available, or must be assured never to need disk storage (because main memory is large enough to hold it). Notice that this is an instantaneous count, not an average over the time interval. Note: -1 indicates Unknown, 9223372036854775807 indicates Value_Exceeds_Maximum and -9223372036854775808 indicates Value_Exceeds_Minimum.
Committed kBytes The number of KBs of virtual memory that have been committed on a system. Note: the value 9223372036854775807 indicates Value_Exceeds_Maximum and the value -9223372036854775808 indicates Value_Exceeds_Minimum.
Demand Zero Faults/sec The rate at which a zeroed page is required to satisfy the fault. Zeroed pages are pages emptied of previously stored data and filled with zeros. These are a security feature of Windows that prevent processes from seeing data stored by earlier processes that used the memory space. Windows maintains a list of zeroed pages to accelerate this process. This counter shows the number of faults, without regard to the number of pages retrieved to satisfy the fault. This counter displays the difference between the values observed in the last two samples, divided by the duration of the sample interval. Note: the value 2147483647 indicates Value_Exceeds_Maximum and the value -2147483648 indicates Value_Exceeds_Minimum.
Free System Page Table Entries The number of page table entries a system is not currently using. Note: the value 2147483647 indicates Value_Exceeds_Maximum and the value -2147483648 indicates Value_Exceeds_Minimum.
Memory Usage Percentage The percent of bytes of real memory in use. Calculated as 100 * (Committed Bytes divided by Total Memory Bytes). Note that this value can exceed 100 since Committed Bytes is a measure of virtual memory while Total Memory Bytes is a measure of real memory. A value greater than 100 indicates that the computer is paging. Note: -1 indicates Unknown.
Page Faults/sec The number of page faults in the processor. Note that page faults occur when a process refers to a page that is not in its Working Set in main memory. A Page Fault will not cause the page to be fetched from disk if that page is on the standby list, and hence already in main memory, or if it is in use by another process with whom the page is shared. Note: the value 2147483647 indicates Value_Exceeds_Maximum and the value -2147483648 indicates Value_Exceeds_Minimum.
Page Reads/sec The number of times the disk was read to retrieve pages of virtual memory necessary to resolve page faults. Multiple pages can be read during a disk read operation. Note: the value 2147483647 indicates Value_Exceeds_Maximum and the value -2147483648 indicates Value_Exceeds_Minimum.
Page Writes/sec The count of the number of times pages have been written to the disk because they were changed since last retrieved. Each such write operation may transfer a number of pages. Note: the value 2147483647 indicates Value_Exceeds_Maximum and the value -2147483648 indicates Value_Exceeds_Minimum.
Pages/sec The number of pages read from the disk or written to the disk to resolve memory references to pages that were not in memory at the time of the reference. This is the sum of Pages Input/Sec and Pages Output/Sec attributes. This counter includes paging traffic on behalf of the system cache to access file data for applications. This is the primary counter to observe if you are concerned about excessive memory pressure (that is, thrashing), and the excessive paging that may result. Note: the value 2147483647 indicates Value_Exceeds_Maximum and the value -2147483648 indicates Value_Exceeds_Minimum.
Pages Input/sec The number of pages read from the disk to resolve memory references to pages that were not in memory at the time of the reference. This counter includes paging traffic on behalf of the system cache to access file data for applications. This is an important counter to observe if you are concerned about excessive memory pressure (that is, thrashing), and the excessive paging that may result. Note: the value 2147483647 indicates Value_Exceeds_Maximum and the value -2147483648 indicates Value_Exceeds_Minimum.
Pages Output/sec The count of the number of pages that are written to disk because the pages have been modified in main memory. Note: the value 2147483647 indicates Value_Exceeds_Maximum and the value -2147483648 indicates Value_Exceeds_Minimum.
Pool Nonpaged Allocs The number of calls to allocate space in the system nonpaged pool. Nonpaged pool is a system memory area where space is acquired by operating system components as they accomplish their appointed tasks. nonpaged pool pages cannot be paged out to the paging file, but instead remain in main memory as long as they are allocated. Note: the value 2147483647 indicates Value_Exceeds_Maximum and the value -2147483648 indicates Value_Exceeds_Minimum.
Pool Nonpaged Bytes The number of bytes in the nonpaged pool, a system memory area where space is acquired by operating system components as they accomplish their appointed tasks. Nonpaged pool pages cannot be paged out to the paging file, but instead remain in main memory as long as they are allocated. Note: -1 indicates Unknown, 9223372036854775807 indicates Value_Exceeds_Maximum and -9223372036854775808 indicates Value_Exceeds_Minimum.
Pool Nonpaged kBytes The number of KBs in the nonpaged pool area of memory. Note: the value 9223372036854775807 indicates Value_Exceeds_Maximum and the value -9223372036854775808 indicates Value_Exceeds_Minimum.
Pool Paged Allocs The number of calls to allocate space in the system paged pool. Paged pool is a system memory area where space is acquired by operating system components as they accomplish their appointed tasks. Paged pool pages can be paged out to the paging file when not accessed by the system for sustained periods of time. Note: the value 2147483647 indicates Value_Exceeds_Maximum and the value -2147483648 indicates Value_Exceeds_Minimum.
Pool Paged Bytes The number of bytes in the paged pool area, a system memory area where space is acquired by operating system components as they accomplish their appointed tasks. Paged pool pages can be paged out to the paging file when not accessed by the system for sustained periods of time. Note: -1 indicates Unknown, 9223372036854775807 indicates Value_Exceeds_Maximum and -9223372036854775808 indicates Value_Exceeds_Minimum.
Pool Paged kBytes The number of KBs in the paged pool area of memory. Note: the value 9223372036854775807 indicates Value_Exceeds_Maximum and the value -9223372036854775808 indicates Value_Exceeds_Minimum.
Pool Paged Resident Bytes The current size of the paged pool. The paged pool is an area of physical memory acquired by the operating system for objects that can be paged out to the paging file when not accessed by the system for sustained periods of time. Note: the value 9223372036854775807 indicates Value_Exceeds_Maximum and the value -9223372036854775808 indicates Value_Exceeds_Minimum.
Server Name The managed system name. The form should be hostname:agent_code.
Examples include spark:KNT or deux.raleigh.ibm.com:KNT.
In workspace queries, this attribute should be set equal to the value $NODE$ in order to populate the workspace with data. This attribute is generally not included in situations, unless there is a need to customize the situation for a specific managed system.
System Cache Resident Bytes The number of bytes from the system cache that are resident in physical memory. This does not include virtual memory not currently resident. Note: the value 9223372036854775807 indicates Value_Exceeds_Maximum and the value -9223372036854775808 indicates Value_Exceeds_Minimum.
System Code Total Bytes The number of bytes of pageable operating system code that is currently in virtual memory. Note: the value 9223372036854775807 indicates Value_Exceeds_Maximum and the value -9223372036854775808 indicates Value_Exceeds_Minimum.
System Driver Resident Bytes The number of bytes of pageable physical memory being used by device drivers. Note: the value 9223372036854775807 indicates Value_Exceeds_Maximum and the value -9223372036854775808 indicates Value_Exceeds_Minimum.
System Driver Total Bytes The number of bytes of pageable virtual memory that is currently being used by device drivers. Note: the value 9223372036854775807 indicates Value_Exceeds_Maximum and the value -9223372036854775808 indicates Value_Exceeds_Minimum.
Timestamp The date and time the Tivoli Enterprise Monitoring Server samples the data.
Total Memory Size (Bytes) The number of bytes of installed random access memory (RAM) in the computer. Note: -1 indicates Unknown and 9223372036854775807 indicates Value_Exceeds_Maximum.
Total Memory Size (KB) The number of kilobytes of installed random access memory (RAM) in the computer. Note: -1 indicates Unknown and 9223372036854775807 indicates Value_Exceeds_Maximum.
Total Memory Size (MB) The number of megabytes of installed random access memory (RAM) in the computer. Note: -1 indicates Unknown and 9223372036854775807 indicates Value_Exceeds_Maximum.
Transition Faults/sec The number of page faults resolved by recovering pages that were in transition, that is, being written to disk at the time of the page fault. The pages were recovered without additional disk activity. Note: the value 2147483647 indicates Value_Exceeds_Maximum and the value -2147483648 indicates Value_Exceeds_Minimum.
Working Set Total Bytes The number of bytes of real memory allocated to currently running processes. Note: -1 indicates Unknown and 9223372036854775807 indicates Value_Exceeds_Maximum.
Working Set Total kBytes The number of KBs of real memory allocated to currently running processes. Note: -1 indicates Unknown and 9223372036854775807 indicates Value_Exceeds_Maximum.
Working Set Total Usage Percentage The percent of bytes of real memory allocated to currently running processes. Calculated as 100 * (Total Working Set Bytes divided by Total Memory Bytes). Note: -1 indicates Unknown.
Write Copies/sec The number of page faults that have been satisfied by making a copy of a page when an attempt to write to the page is made. This is an economical way of sharing data since the copy of the page is only made on an attempt to write to the page; otherwise, the page is shared. Note: the value 2147483647 indicates Value_Exceeds_Maximum and the value -2147483648 indicates Value_Exceeds_Minimum.