Re: JMX-MBean Reports OffHeapAllocatedSize as zero

[dkarachentsev]

Hi Christoph,

This metric is not implemented because of complexity. But you may get to
know now much of space your cache or cashes consumes with DataRegionMetrics:
DataRegionMetrics drm = ignite.dataRegionMetrics("region_name");

long used = (long)(drm.getPhysicalMemorySize() * drm.getPagesFillFactor());

So if you don't use persistence and set custom data region for cache, you
can size, consumed by it.

Thanks!
-Dmitry



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Re: JMX-MBean Reports OffHeapAllocatedSize as zero

[Christoph Weißenborn]

Hi,
I step into the code and ended up in this method in
IgniteCacheOffheapManagerImpl:

@Override public long offHeapAllocatedSize() {
// TODO GG-10884.
return 0;
}

Is ticket GG-10884 about resolving this TODO or did it introduced this TODO?
Is there a schedule for this TODO? If yes, where/how can I find it?

KR, Christoph



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Re: JMX-MBean Reports OffHeapAllocatedSize as zero

[Christoph Weißenborn]

Hi Val and others,
same behavior with Ignite 2.4.0, MBean-CacheMetrics always report
OffHeapAllocatedSize zero.
Is this a bug, a feature/expected? Can I somehow change setup to get a
metric for off heap usage?

KR, Christoph



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Re: JMX-MBean Reports OffHeapAllocatedSize as zero

[vkulichenko]

Hi Christoph,

Can you try 2.4.0? I know there were some fixes for memory metrics, so there
is a big chance you will not reproduce the issue with the latest version.

-Val



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JMX-MBean Reports OffHeapAllocatedSize as zero

[Christoph]

Hi,
I use a partitioned cache with off heap in Ignite 2.3.0. After putting some
values I see in JMX MBean
org.apache"org.apache.ignite.internal.processors.cache.CacheClusterMetricsMXBeanImpl"
some entries with prefix OffHeap.
Value OffHeapEntriesCount is the number of stored entries and now 3178.
*Value OffHeapAllocatedSize is 0.*
But CachePuts is 3178, AveragePutTime is 328.502 and
OffHeapPrimaryEntriesCount is 3178.
The 3178 values can be retrieved from the cache. So I believe they are
stored in off heap.

I also run a test with 1 million entries and OffHeapAllocatedSize states
zero.

*Is this expected behaviour?*

Kind regards,
Christoph