onstat -g vpcache command: Print CPU virtual processor and tenant virtual processor private memory cache statistics
Run the onstat -g vpcache command to display statistics about CPU virtual processor and tenant virtual processor private memory caches.
Example output
The output for each CPU or tenant virtual processor has the same format. The following example shows the output for one CPU virtual processor.
Figure 1. onstat -g vpcache command output
CPU virtual processor memory block cache statistics - 4096 byte blocks
Number of 4096 byte memory blocks requested for each CPU virtual processor:262144
CPU virtual processor memory block cache mode : Dynamic
vpid pid Blocks held Hit percentage Free cache
1 2557540 4667202 99.2 % 100.0 %
Current total virtual processor allocations from cache: 59466799, Total frees: 60209953
size cur blks tgt blks alloc miss free drain draintime
1 1662023 9661 49167485 0 49816526 0 Thu Apr 11 09:43:35 2013
2 130 52428 7609556 297043 7609612 0 Thu Jan 1 00:00:00 1970
3 329160 9 905094 0 943256 0 Thu Apr 11 09:43:36 2013
4 424 9 306637 16192 306506 0 Thu Apr 11 09:43:33 2013
5 10 9 119313 122607 119315 0 Thu Apr 11 09:43:36 2013
6 20790 9 55305 0 57700 0 Thu Apr 11 09:43:23 2013
7 9877 9 31164 0 31942 0 Thu Apr 11 09:43:14 2013
8 2816 5242 6500 0 6537 0 Thu Jan 1 00:00:00 1970
9 234 9 606575 8323 605525 0 Thu Apr 11 09:43:36 2013
10 1130 9 5597 0 5679 0 Thu Apr 11 09:43:18 2013
11 231 5242 1808 0 1753 0 Thu Jan 1 00:00:00 1970
12 1068 9 5667 0 5666 0 Thu Apr 11 09:43:28 2013
13 65 5242 7114 175 7110 0 Thu Jan 1 00:00:00 1970
14 28 5242 26200 172 26185 0 Thu Jan 1 00:00:00 1970
15 30 5242 13562 553 13547 0 Thu Jan 1 00:00:00 1970
16 2627136 34 349124 0 408425 0 Thu Apr 11 09:43:35 2013
17 1309 9 59 0 107 0 Thu Apr 11 09:27:33 2013
18 198 5242 7 0 6 0 Thu Jan 1 00:00:00 1970
19 190 5242 5 0 1 0 Thu Jan 1 00:00:00 1970
20 60 5242 30 19 19 0 Thu Jan 1 00:00:00 1970
21 462 5242 38 0 43 0 Thu Jan 1 00:00:00 1970
22 22 5242 3 0 1 0 Thu Jan 1 00:00:00 1970
23 69 5242 141 15 135 0 Thu Jan 1 00:00:00 1970
24 4944 35 189509 2078 185347 0 Thu Apr 11 09:43:35 2013
25 75 5242 1 0 1 0 Thu Jan 1 00:00:00 1970
26 0 9 364 220 361 0 Thu Apr 11 09:39:17 2013
27 27 5242 1 0 2 0 Thu Jan 1 00:00:00 1970
28 56 5242 415 33 410 0 Thu Jan 1 00:00:00 1970
29 319 5242 7101 735 7088 0 Thu Jan 1 00:00:00 1970
30 3240 5242 174 0 223 0 Thu Jan 1 00:00:00 1970
31 279 11 51994 2515 50682 0 Thu Apr 11 09:43:36 2013
32 800 5242 256 0 243 0 Thu Jan 1 00:00:00 1970Output description
- vpid
- The ID of the virtual processor
- pid
- The process ID for the virtual processor that is assigned by the operating system
- Blocks held
- The number of 4096 byte blocks that are available in the private memory cache
- Hit percentage
- The percentage of time that a block was available when requested
- Free cache
- The percentage of time that blocks were freed for reuse without being drained
- Current VP total allocations from cache
- The number of times a block or group of blocks was taken from the cache
- Total frees
- The number of times a block or group of blocks was added to the cache
- size
- The size of the memory blocks, in 4096-byte blocks
- cur blks
- The current number of 4096-byte blocks that are allocated (a multiple of size)
- tgt blks
- The target number of blocks for the cache entry before the cache is drained
- alloc
- The number of times a requestor received a block of this size
- miss
- The number of times a block was requested but none were available
- free
- The number of times a memory block was placed into the cache
- drain
- The number of times an aged block was forced out to make room for another block
- draintime
- The last time the bin of memory blocks was drained