Re: [Hawkular-dev] agent "new server" event
On Mar 29, 2017, at 4:35 AM, Joel Takvorian
<jtakvori(a)redhat.com> wrote:
On Tue, Mar 28, 2017 at 4:09 PM, John Sanda <jsanda(a)redhat.com
<mailto:jsanda@redhat.com>> wrote:
We are introducing a feature to purge metric definitions that have not received any data
for some time.
If I understand this PR [1], metrics are eligible for deletion only when their data
points have all expired. If it's true then fixing the TTL problem also fixes the
metrics expiration problem.
[1] https://github.com/hawkular/hawkular-metrics/pull/785
<https://github.com/hawkular/hawkular-metrics/pull/785>
Prior to this PR we
added support for metric deletion; however, deletion does not result in immediate deletion
of data points. We still let data points in in the data_compressed table expire. We do
this because one of the guidelines for using TimeWindowCompactionStrategy (TWCS) is to use
a global TTL and not delete data.
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