Document revision date: 30 March 2001 | |
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If you enter the /NOOUTPUT qualifier, output is suppressed.
You can use the following keywords with the /PAGE qualifier:
CLEAR_SCREEN | Clears the screen before each page is displayed. |
SCROLL | Displays information one line at a time. |
SAVE[= n] | Enables screen navigation of information, where n is the number of pages to store. |
The /PAGE=SAVE qualifier allows you to navigate through screens of information. The /PAGE=SAVE qualifier stores up to 5 screens of up to 255 columns of information. When you use the /PAGE=SAVE qualifier, you can use the following keys to navigate through the information:
Key Sequence | Description |
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Up arrow key, Ctrl/B | Scroll up one line. |
Down arrow key | Scroll down one line. |
Left arrow key | Scroll left one column. |
Right arrow key | Scroll right one column. |
Find (E1) | Specify a string to find when the information is displayed. |
Insert Here (E2) | Scroll right one half screen. |
Remove (E3) | Scroll left one half screen. |
Select (E4) | Toggle 80/132 column mode. |
Prev Screen (E5) | Get the previous page of information. |
Next Screen (E6), Return, Enter, Space | Get the next page of information. |
F10, Ctrl/Z | Exit. (Some utilities define these differently.) |
Help (F15) | Display utility help text. |
Do (F16) | Toggle the display to oldest/newest page. |
Ctrl/W | Refresh the display. |
The /PAGE qualifier is not compatible with the /OUTPUT qualifier.
You can also dynamically change the search string by pressing the Find key (E1) while the information is being displayed. Quotation marks are not required for a dynamic search.
The /NOWRAP qualifier extends lines beyond the width of the screen and can be seen when you use the scrolling (left and right) features provided by the /PAGE=SAVE qualifier.
#1 |
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$ SHOW MEMORY System Memory Resources on 20-JAN-2001 15:22:04.11 Physical Memory Usage (pages): Total Free In Use Modified Main Memory (2.00Gb) 262144 201249 60162 733 Extended File Cache (Time of last reset: 18-JAN-2001 17:15:14.33) Allocated (Mbytes) 370.00 Maximum size (Mbytes) 1024.00 Free (Mbytes) 317.79 Minimum size (Mbytes) 370.00 In use (Mbytes) 52.20 Percentage Read I/Os 72% Read hit rate 96% Write hit rate 0% Read I/O count 119363 Write I/O count 46259 Read hit count 115283 Write hit count 0 Reads bypassing cache 45 Writes bypassing cache 0 Files cached open 372 Files cached closed 392 Vols in Full XFC mode 0 Vols in VIOC Compatible mode 3 Vols in No Caching mode 0 Vols in Perm. No Caching mode 0 Granularity Hint Regions (pages): Total Free In Use Released Execlet code region 1024 0 586 438 Execlet data region 256 0 256 0 S0/S1 Executive data region 576 0 576 0 Resident image code region 1024 0 830 194 Slot Usage (slots): Total Free Resident Swapped Process Entry Slots 647 614 33 0 Balance Set Slots 645 614 31 0 Dynamic Memory Usage: Total Free In Use Largest Nonpaged Dynamic Memory (Mb) 4.28 2.38 1.89 2.25 Bus Addressable Memory (Kb) 168.00 128.00 40.00 128.00 Paged Dynamic Memory (Mb) 5.68 3.42 2.26 3.41 Lock Manager Dyn Memory (Mb) 1.13 0.00 1.12 Buffer Object Usage (pages): In Use Peak 32-bit System Space Windows (S0/S1) 3 3 64-bit System Space Windows (S2) 0 0 Physical pages locked by buffer objects 3 3 Memory Reservations (pages): Group Reserved In Use Type VCC$MIN_CACHE_SIZE --- 47360 47360 Allocated Total (370.00 Mbytes reserved) 47360 47360 Swap File Usage (8KB pages): Index Free Size DISK$X6XV_BRAHMA:[SYS0.SYSEXE]SWAPFILE.SYS 1 5168 5168 Paging File Usage (8KB pages): Index Free Size DISK$X6XV_BRAHMA:[SYS0.SYSEXE]PAGEFILE.SYS 254 215288 215288 Total committed paging file usage: 7418 Of the physical pages in use, 4951 pages are permanently allocated to OpenVMS. |
This example shows reservable pages. If the reservable pages are a negative value, this indicates that you may want to consider adding to the fixed amount of pagefile space available.
#2 |
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$ SHOW MEMORY/CACHE/FULL System Memory Resources on 3-NOV-2001 18:36:12.79 Extended File Cache (Time of last reset: 31-OCT-2001 10:18:07.39) Allocated (Mbytes) (1)370.00 Maximum size (Mbytes) (9)1024.00 Free (Mbytes) (2)319.75 Minimum size (Mbytes) (10) 370.0 In use (Mbytes) (3) 50.25 Percentage Read I/Os (11) 98% Read hit rate (4) 79% Write hit rate (12) 0% Read I/O count (5) 18110 Write I/O count (13) 310 Read hit count (6) 14343 Write hit count (14) 0 Reads bypassing cache (7) 37 Writes bypassing cache (15) 0 Files cached open (8) 351 Files cached closed (16) 307 Vols in Full XFC mode (17) 0 Vols in VIOC Compatible mode (17) 0 Vols in No Caching mode(17) 0 Vols in Perm No Caching mode (17) 0 I/O Statistics (18) _ Distributions (MAX_IO_SIZE: 127 (19)) ------------------------------------------------------- Transfer Size: Reads Read Hits Writes 1 Block IO: 35053 (20) 34553 (21) 87 (22) 2 Block IO: 469 284 9 3 Block IO: 26516 26346 24 4 Block IO: 348 205 6 5 Block IO: 13205 13160 0 6 Block IO: 161 111 0 7 Block IO: 185 152 0 . . . 114 Block IO: 1 0 0 116 Block IO: 2 1 0 121 Block IO: 1 0 0 >127<256 Block IO: 12 0 >255 Block IO: 14 0 ---------------------------------------------------- Totals: 84411 80535 630 |
Note
This example shows the output for the SHOW MEMORY/CACHE/FULL command on an Alpha system with the Extended File Cache loaded. The SHOW MEMORY/CACHE/FULL command will display different fields on a VAX system or on an Alpha system with the Virtual I/O Cache loaded.Extended File Cache Usage
Shows the use of the Extended File Cache facility on an Alpha system.
(1) Allocated Total amount of system memory in megabytes allocated to the Extended File Cache. (2) Free Number of allocated megabytes not currently in use by the cache. (3) In use Number of allocated megabytes that contain valid cached data. (4) Read hit rate Shows cache read hits as a percentage of read I/Os. (5) Read I/O count Total number of read I/Os that have been seen by the cache since the last statistics reset. (6) Read hit count Total number of read I/Os that did not perform a physical I/O, because the data for these was found in the cache since the prior statistics reset. (7) Reads bypassing cache Total number of reads that bypassed the cache and went directly to disk since the last statistics reset. (8) Files cached open Total number of open files in cache. (9) Maximum size (Mbytes) Maximum size of the cache in megabytes. (10) Minimum size (Mbytes) Minimum size of the cache in megabytes. This displays the value of the memory reservation, VCC$MIN_CACHE_SIZE. Refer to the OpenVMS System Manager's Manual for additional information. (11) Percentage Read I/Os Percentage of read I/Os that occur. For example, a read/write I/O ratio of 100% implies that all were read I/Os. (12) Write hit rate (Always zero for Extended File Cache, Version 1.) (13) Write I/O count Total number of write I/Os that have been seen by the cache since the last statistics reset. (14) Write hit count (Always zero for Extended File Cache, Version 1.) (15) Writes bypassing cache Total number of writes that bypassed the cache and went directly to disk since the last statistics reset. (16) Files cached closed Total number of closed files in cache. (17) Volume modes Total number of volumes in each caching state. Note that the initial release of XFC only supports VIOC compatible mode. Future releases will support full mode. (18) I/O Statistics Systemwide distribution of I/O sizes (rounded up). (19) MAX_IO_SIZE Current setting of the system parameter VCC_MAX_IO_SIZE in blocks. The extended file cache (XFC) will only cache files up to this size. (20) Reads Number of reads for the entire system. (21) Read Hits Number of reads satisfied from the cache. (22) Writes Number of writes for the entire system.
#3 |
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$ SHOW MEMORY/CACHE=(VOLUME=*) System Memory Resources on 20-JAN-2001 15:35:32.51 Extended File Cache Volume Statistics: _$7$DKA200: (DISK$X6XV_BRAHMA), Caching mode is VIOC Compatible Open files (1) 372 Closed files (9) 395 Files ever opened (2) 1007 Files ever deposed (10) 240 Allocated pages (3) 6405 Locks acquired (11) 736 Total QIOs (4) 166552 Read hits (12) 115984 Virtual reads (5) 120068 Virtual writes (13) 46484 Hit rate (6) 69 % Read aheads (14) 11766 Read throughs (7) 120021 Write throughs (15) 46484 Read arounds (8) 47 Write arounds (16) 0 Ave Disk I/O Resp Time incl cache hits (microseconds)(17) 3497 Total of 1 volumes in cache |
Extended File Cache Usage
Shows the use of the Extended File Cache facility on an Alpha system.
(1) Open files Number of files that are currently open and cached by the extended file cache on this volume at the instant the SHOW command was issued. (2) Files ever opened Number of times the extended file cache has been requested to open a file on this volume. (3) Allocated pages Number of main memory data pages currently being used by the extended file cache to contain actual file data, for this volume. (4) Total QIOs Total number of QIO and PAGE I/O calls received by the extended file cache on this volume. (5) Virtual reads Cumulative number of Virtual Read requests received by the extended file cache on this volume. (6) Hit rate Percentage of Total QIOs that were completed by copying data from cache, rather than issuing real I/O to a volume. (7) Read throughs Number of Virtual Reads that are capable of being satisfied by the extended file cache. (8) Read arounds Number of Virtual Reads that cannot be satisfied by the extended file cache. Reasons for this include the presence of a non-XFC compliant node in an OpenVMS cluster, and the receipt of an I/O that is larger than VCC_MAX_IO_SIZE. (9) Closed files Number of closed files the extended file cache has in memory. If a subsequent file access occurs, data will be accessible from main memory rather than having to issue I/O to the real volume. (10) Files ever deposed Files removed from memory. Reasons the extended file cache may remove a file from its memory include requests for memory from the rest of the system, and conflicting access modes in a cluster. (11) Locks acquired Current number of file access locks that are in use on this volume. (12) Read hits Cumulative number of times a read has been satisfied from the data cache. (13) Virtual writes Cumulative number of virtual write I/Os received on this volume by the cache. (14) Read aheads Cumulative number of times the extended file cache issued read ahead I/Os on this volume after detecting sequential file I/O virtual reads. (15) Write throughs Cumulative number of times a virtual write has been capable of modifying cached data. (16) Write arounds Cumulative number of times a virtual write has been detected that cannot update data in cache memory. (17) Average Disk I/O Response Time Average disk I/O response time, including cache hits, in microseconds. Note that on a symmetric multiprocessing (SMP) system, the response time only includes that of I/Os starting or finishing on the same CPU. Any physical I/Os are ignored.
#4 |
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$ SHOW MEMORY/CACHE=(VOL=DKA100,TOPQIO=3) System Memory Resources on 3-NOV-2001 18:36:12.79 Extended File Cache Top QIO File Statistics: _$7$DKA200: (DISK$X6Y0_RESD), Caching mode is VIOC Compatible _$7$DKA200:[SYS0.SYSEXE]SYSDUMP.DMP;2 (open) Caching is enabled, active caching mode is Write Through Allocated pages (1) 334 Total QIOs (6) 1712 Read hits (2) 1559 Virtual reads (7) 1712 Virtual writes (3) 0 Hit rate (8) 91 % Read aheads (4) 0 Read throughs (9) 0 Write throughs (5) 0 Read arounds (10) 0 Write arounds (11) 0 _$7$DKA200:[VMS$COMMON.SYSEXE]SYS$QUEUE_MANAGER.QMAN$JOURNAL;1 (open) Caching is enabled, active caching mode is Write Through Allocated pages 931 Total QIOs 1057 Read hits 5 Virtual reads 1044 Virtual writes 13 Hit rate 0 % Read aheads 2 Read throughs 1044 Write throughs 13 Read arounds 0 Write arounds 0 _$7$DKA200:[VMS$COMMON.SYSLIB]DECC$SHR.EXE;1 (open) Caching is enabled, active caching mode is Write Through Allocated pages 135 Total QIOs 730 Read hits 673 Virtual reads 730 Virtual writes 0 Hit rate 0 % Read aheads 2 Read throughs 0 Write throughs 0 Read arounds 0 Write arounds 0 Total of 3 files for this volume |
Extended File Cache Top QIO File Statistics Usage
Shows the use of the Extended File Cache Top QIO File Statistics facility on an Alpha system.
(1) Allocated pages Number of main memory data pages currently being used by the extended file cache to contain actual file data, for this volume (2) Read hits Cumulative number of times a read has been satisfied from the data cache. (3) Virtual writes Cumulative number of virtual write I/Os received on this volume by the cache. (4) Read aheads Cumulative number of times the extended file cache issued read ahead I/Os on this volume after detecting sequential file I/O virtual reads. (5) Write throughs Cumulative number of times a virtual write has been capable of modifying cached data. (6) Total QIOs Total number of QIO and PAGE I/O calls received by the extended file cache on this volume. (7) Virtual reads Cumulative number of Virtual Read requests received by the extended file cache on this volume. (8) Hit rate Percentage of Total QIOs that were completed by copying data from cache, rather than issuing real I/O to a volume. (9) Read throughs Number of Virtual Reads that are capable of being satisfied by the extended file cache. (10) Read arounds Number of Virtual Reads that cannot be satisfied by the extended file cache. Reasons for this include the presence of a non-XFC compliant node in an OpenVMS cluster, and the receipt of an I/O that is larger than VCC_MAX_IO_SIZE. (11) Write arounds Cumulative number of times a virtual write has been detected that cannot update data in cache memory.
#5 |
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$ SHOW MEMORY/CACHE=(VOL=DKA100,TOPHITRATE=3) System Memory Resources on 3-NOV-2001 18:36:12.79 Extended File Cache Top Hitrate File Statistics: _$7$DKA200: (DISK$X6Y0_RESD), Caching mode is VIOC Compatible _$7$DKA200:[VMS$COMMON.SYSLIB]SMGSHR.EXE;1 (open) Caching is enabled, active caching mode is Write Through Allocated pages (1) 16 Total QIOs (6) 277 Read hits (2) 267 Virtual reads (7) 277 Virtual writes (3) 0 Hit rate (8) 96 % Read aheads (4) 0 Read throughs (9) 277 Write throughs (5) 0 Read arounds (10) 0 Write arounds (11) 0 _$7$DKA200:[VMS$COMMON.SYSLIB]UTIL$SHARE.EXE;1 (open) Caching is enabled, active caching mode is Write Through Allocated pages 8 Total QIOs 185 Read hits 178 Virtual reads 185 Virtual writes 0 Hit rate 96 % Read aheads 1 Read throughs 185 Write throughs 0 Read arounds 0 Write arounds 0 _$7$DKA200:[VMS$COMMON.SYSLIB]CMA$TIS_SHR.EXE;1 (open) Caching is enabled, active caching mode is Write Through Allocated pages 6 Total QIOs 165 Read hits 159 Virtual reads 165 Virtual writes 0 Hit rate 96 % Read aheads 2 Read throughs 165 Write throughs 0 Read arounds 0 Write arounds 0 Total of 3 files for this volume |
Extended File Cache Top Hitrate File Statistics Usage
Shows the use of the Extended File Cache Top Hitrate File Statistics facility on an Alpha system.
(1) Allocated pages .Number of main memory data pages currently being used by the extended file cache to contain actual file data, for this volume (2) Read hits Cumulative number of times a read has been satisfied from the data cache. (3) Virtual writes Cumulative number of virtual write I/Os received on this volume by the cache. (4) Read aheads Cumulative number of times the extended file cache issued read ahead I/Os on this volume after detecting sequential file I/O virtual reads. (5) Write throughs Cumulative number of times a virtual write has been capable of modifying cached data. (6) Total QIOs Total number of QIO and PAGE I/O calls received by the extended file cache on this volume. (7) Virtual reads Cumulative number of Virtual Read requests received by the extended file cache on this volume. (8) Hit rate Percentage of Total QIOs that were completed by copying data from cache, rather than issuing real I/O to a volume. (9) Read throughs Number of Virtual Reads that are capable of being satisfied by the extended file cache. (10) Read arounds Number of Virtual Reads that cannot be satisfied by the extended file cache. Reasons for this include the presence of a non-XFC compliant node in an OpenVMS cluster, and the receipt of an I/O that is larger than VCC_MAX_IO_SIZE. (11) Write arounds Cumulative number of times a virtual write has been detected that cannot update data in cache memory.
#6 |
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$ SHOW MEMORY/CACHE=(FILE=SYS$LOGIN:*.*,OPEN,CLOSED) System Memory Resources on 3-NOV-2001 18:36:12.79 Extended File Cache Statistics: _$7$DKA200:[SYS0.SYSMGR]ACCOUNTNG.DAT;1 (open) Caching is enabled, active caching mode is Write Through Allocated pages (1) 1 Total QIOs (6) 17 Read hits (2) 0 Virtual reads (7) 1 Virtual writes (3) 16 Hit rate (8) 0 % Read aheads (4) 0 Read throughs (9) 0 Write throughs (5) 16 Read arounds (10) 0 Write arounds (11) 0 _$7$DKA200:[SYS0.SYSMGR]ACME$SERVER.LOG;129 (open) Caching is enabled, active caching mode is Write Through Allocated pages 1 Total QIOs 2 Read hits 0 Virtual reads 1 Virtual writes 1 Hit rate 0 % Read aheads 0 Read throughs 1 Write throughs 1 Read arounds 0 Write arounds 0 _$7$DKA200:[SYS0.SYSMGR]CLUE$STARTUP_BRAHMA.LOG;935 (closed) Caching is enabled, active caching mode is Write Through Allocated pages 2 Total QIOs 32 Read hits 0 Virtual reads 0 Virtual writes 32 Hit rate 0 % Read aheads 0 Read throughs 0 Write throughs 32 Read arounds 0 Write arounds 0 . . . _$7$DKA200:[VMS$COMMON.SYSMGR]VMS$AUDIT_SERVER.DAT;1 (open) Caching is enabled, active caching mode is Write Through Allocated pages 1 Total QIOs 8 Read hits 3 Virtual reads 8 Virtual writes 0 Hit rate 37 % Read aheads 1 Read throughs 8 Write throughs 0 Read arounds 0 Write arounds 0 Total of 50 files for this volume |
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