Re: Visor: cache counts are twice of what is expected

[vkulichenko]

Hi Roger,

It's a known issue and fixed in master. You can try to build from there or
check the latest nightly build:
https://builds.apache.org/view/H-L/view/Ignite/job/Ignite-nightly/lastSuccessfulBuild/

-Val



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Visor: cache counts are twice of what is expected

[Roger Fischer (CW)]

Hello,

the cache counts that are shown in Visor seem to be twice the number that is 
expected.

I am using ver. 2.1.0#20170720-sha1:a6ca5c8a, with native persistence.

For a replicated cache, with 363 objects loaded (select count(*) returns 363):

Nodes for: FabricCache(@c0)
+===+
|   Node ID8(@), IP   | CPUs | Heap Used | CPU Load |   Up Time|
 Size | Hi/Mi/Rd/Wr |
+===+
| E90ED5E1(@n2), 10.24.51.150 | 4| 20.79 %   | 0.57 %   | 00:22:30:440 | 
Total: 726   | Hi: 0   |
| |  |   |  |  |   
Heap: 363  | Mi: 0   |
| |  |   |  |  |   
Off-Heap: 363  | Rd: 0   |
| |  |   |  |  |   
Off-Heap Memory: 0 | Wr: 0   |
+-+--+---+--+--+--+-+
| 31CC5BE0(@n1), 10.24.51.187 | 4| 19.38 %   | 0.33 %   | 00:22:36:115 | 
Total: 726   | Hi: 0   |
| |  |   |  |  |   
Heap: 363  | Mi: 0   |
| |  |   |  |  |   
Off-Heap: 363  | Rd: 0   |
| |  |   |  |  |   
Off-Heap Memory: 0 | Wr: 0   |
+-+--+---+--+--+--+-+
| 5BB20689(@n0), 10.24.51.190 | 4| 18.40 %   | 0.40 %   | 00:22:42:711 | 
Total: 726   | Hi: 0   |
| |  |   |  |  |   
Heap: 363  | Mi: 0   |
| |  |   |  |  |   
Off-Heap: 363  | Rd: 0   |
| |  |   |  |  |   
Off-Heap Memory: 0 | Wr: 0   |
+---+

Each node shows 363 objects on the heap and 363 objects off-heap, for a total 
of 726 (twice as many as expected).

Similar for a partitioned cache, with one backup. 4.8M objects are loaded 
(select count(*) ...):

Nodes for: StatsCache(@c1)
+===+
|   Node ID8(@), IP   | CPUs | Heap Used | CPU Load |   Up Time|
 Size | Hi/Mi/Rd/Wr |
+===+
| E90ED5E1(@n2), 10.24.51.150 | 4| 27.44 %   | 0.67 %   | 01:06:31:092 | 
Total: 6496068   | Hi: 0   |
| |  |   |  |  |   
Heap: 3248034  | Mi: 0   |
| |  |   |  |  |   
Off-Heap: 3248034  | Rd: 0   |
| |  |   |  |  |   
Off-Heap Memory: 0 | Wr: 0   |
+-+--+---+--+--+--+-+
| 31CC5BE0(@n1), 10.24.51.187 | 4| 33.12 %   | 0.33 %   | 01:06:36:770 | 
Total: 6236714   | Hi: 0   |
| |  |   |  |  |   
Heap: 3118357  | Mi: 0   |
| |  |   |  |  |   
Off-Heap: 3118357  | Rd: 0   |
| |  |   |  |  |   
Off-Heap Memory: 0 | Wr: 0   |
+-+--+---+--+--+--+-+
| 5BB20689(@n0), 10.24.51.190 | 4| 20.17 %   | 0.43 %   | 01:06:43:367 | 
Total: 6467218   | Hi: 0   |
| |  |   |  |  |   
Heap: 3233609  | Mi: 0   |
| |  |   |  |  |   
Off-Heap: 3233609  | Rd: 0   |
| |  |   |  |  |   
Off-Heap Memory: 0 | Wr: 0   |
+---+

The expectation is that each node would have 2/3 of the objects (1/3 as primary 
and another 1/3 as backup). That would be 3.2M objects.

But each node has about 6.4M objects, twice as many as expected. Again it seems 
that each objects is both on and off heap.

Is Visor reporting incorrectly, or are objects stored twice?

Thanks...

Roger