Now I am confused.
I have configured caches correctly to enable statistics (both via
configuration and via direct setting of the flag on an existing cache.
When I log the results for cache statistics (number of Gets and number of
off-help Gets), I notice two things:
- The total number of off heap Gets is always zero (yet I have a lot of RAM
configured as OffHeap storage).
- The total number of Get is very small compared to my other metrics that
are already counting the number of Gets made to the caches.
Right now I would suggest there is a bug somewhere here and cache
statistics are broken.
Raymond.
On Tue, Feb 25, 2025 at 10:45 AM Raymond Wilson <raymond_wil...@trimble.com>
wrote:
> It seems you can modify cache statistics enablement for existing caches
> using the setter on the cache instance. I was setting this flag in the
> configuration for creating a new cache on the GetOrCreateCache(0 call,
> which of course is ignored if the cache already exists.
>
> I am still unsure why the peeking does not work. Given the use of the
> cache Get() statistics most of my use case for using peeking is satisfied.
> However, I am inspecting the content of the payload to derive some
> additional internal metrics beyond just calls count (eg: payload size)
> which are failing given the peeking oddness.
>
> On Mon, Feb 24, 2025 at 11:23 PM Raymond Wilson <
> raymond_wil...@trimble.com> wrote:
>
>> FYI, I am using Ignite 2.16.
>>
>> I have also been playing with the Ignite metrics. This allows me to see
>> the numbers of Get()'s for each cache, but I have a suspicion I can't
>> enable it for existing caches.Is that correct? At least, when I enable it
>> on an existing system I just get zeros back, but a new system appears to
>> track the statistics as expected.
>>
>> Thanks,
>> Raymond.
>>
>>
>> On Fri, Feb 21, 2025 at 12:44 PM Raymond Wilson <
>> raymond_wil...@trimble.com> wrote:
>>
>>> Apologies, Change
>>>
>>> { /* It was read from persistence */ }
>>>
>>> for
>>>
>>> {
>>> /* It needs to be read from persistence */
>>> result = _cache.Get(key);
>>> }
>>>
>>> On Fri, Feb 21, 2025 at 12:39 PM Raymond Wilson <
>>> raymond_wil...@trimble.com> wrote:
>>>
>>>> I am experimenting with some metrics to help us understand how often
>>>> Cache.Get() operations are satisfied by returning a value already
>>>> existing in memory, versus those that are satisfied by needing to read that
>>>> content from the persistent store.
>>>>
>>>> The way I am attempting to do this is by using TryLocalPeek(), eg:
>>>>
>>>> if (_cache.TryLocalPeek(key, out var result,
>>>> CachePeekMode.Onheap, CachePeekMode.Offheap))
>>>> { /* It was already in memory */ }
>>>> else
>>>> { /* It was read from persistence */ }
>>>>
>>>> Oddly, it appears almost all calls are satisfied by the TryLocalPeek()
>>>> call, even on a completely cold restarted system.
>>>>
>>>> Can anyone confirm if my expected behaviour here is correct (and there
>>>> is a bug), or if I am 'doing it wrong' and there is a better way?
>>>>
>>>> Thanks,
>>>> Raymond.
>>>>
>>>>
>>>> --
>>>> <http://www.trimble.com/>
>>>> Raymond Wilson
>>>> Trimble Distinguished Engineer, Civil Construction Software (CCS)
>>>> 11 Birmingham Drive | Christchurch, New Zealand
>>>> raymond_wil...@trimble.com
>>>>
>>>>
>>>> <https://worksos.trimble.com/?utm_source=Trimble&utm_medium=emailsign&utm_campaign=Launch>
>>>>
>>>
>>>
>>> --
>>> <http://www.trimble.com/>
>>> Raymond Wilson
>>> Trimble Distinguished Engineer, Civil Construction Software (CCS)
>>> 11 Birmingham Drive | Christchurch, New Zealand
>>> raymond_wil...@trimble.com
>>>
>>>
>>> <https://worksos.trimble.com/?utm_source=Trimble&utm_medium=emailsign&utm_campaign=Launch>
>>>
>>
>>
>> --
>> <http://www.trimble.com/>
>> Raymond Wilson
>> Trimble Distinguished Engineer, Civil Construction Software (CCS)
>> 11 Birmingham Drive | Christchurch, New Zealand
>> raymond_wil...@trimble.com
>>
>>
>> <https://worksos.trimble.com/?utm_source=Trimble&utm_medium=emailsign&utm_campaign=Launch>
>>
>
>
> --
> <http://www.trimble.com/>
> Raymond Wilson
> Trimble Distinguished Engineer, Civil Construction Software (CCS)
> 11 Birmingham Drive | Christchurch, New Zealand
> raymond_wil...@trimble.com
>
>
> <https://worksos.trimble.com/?utm_source=Trimble&utm_medium=emailsign&utm_campaign=Launch>
>
--
<http://www.trimble.com/>
Raymond Wilson
Trimble Distinguished Engineer, Civil Construction Software (CCS)
11 Birmingham Drive | Christchurch, New Zealand
raymond_wil...@trimble.com
<https://worksos.trimble.com/?utm_source=Trimble&utm_medium=emailsign&utm_campaign=Launch>
