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https://issues.apache.org/jira/browse/OAK-3654?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15024451#comment-15024451
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Chetan Mehrotra commented on OAK-3654:
--------------------------------------
Modified the logic to allow disabling the Timers but keep the meters. Benchmark
numbers improved but still slower
{noformat}
Apache Jackrabbit Oak 1.4-SNAPSHOT
# ReadPropertyTest C min 10% 50% 90% max
N
Oak-Tar 1 6 6 6 7 24
9352
Oak-Tar (1.3.11 1 6 6 6 9 35
8576
Oak-Tar (Metrics Enabled) 1 12 12 12 14 30
4711
Oak-Tar (Only Meters Enabled) 1 8 8 9 10 29
6536
{noformat}
With stats dumped
{noformat}
Apache Jackrabbit Oak 1.4-SNAPSHOT
# ReadPropertyTest C min 10% 50% 90% max
N
18:16:26.568 [main] INFO o.a.j.oak.benchmark.ReadPropertyTest - Enabling
Metrics integration
18:16:56.602 [metrics-logger-reporter-1-thread-1] INFO
org.apache.jackrabbit.oak.metrics - type=GAUGE, name=SESSION_READ_AVERAGE,
value=NaN
18:16:56.603 [metrics-logger-reporter-1-thread-1] INFO
org.apache.jackrabbit.oak.metrics - type=METER, name=SESSION_READ_COUNTER,
count=88118043, mean_rate=2935927.5911976863, m1=2108413.9925555317,
m5=1666734.3265087851, m15=1578093.5724496346, rate_unit=events/second
18:16:56.604 [metrics-logger-reporter-1-thread-1] INFO
org.apache.jackrabbit.oak.metrics - type=TIMER, name=SESSION_READ_DURATION,
count=0, min=0.0, max=0.0, mean=0.0, stddev=0.0, median=0.0, p75=0.0, p95=0.0,
p98=0.0, p99=0.0, p999=0.0, mean_rate=0.0, m1=0.0, m5=0.0, m15=0.0,
rate_unit=events/second, duration_unit=microseconds
18:17:26.601 [metrics-logger-reporter-1-thread-1] INFO
org.apache.jackrabbit.oak.metrics - type=GAUGE, name=SESSION_READ_AVERAGE,
value=NaN
18:17:26.602 [metrics-logger-reporter-1-thread-1] INFO
org.apache.jackrabbit.oak.metrics - type=METER, name=SESSION_READ_COUNTER,
count=187182491, mean_rate=3119082.720643154, m1=2574520.692012776,
m5=1822207.3237623086, m15=1634602.3663047573, rate_unit=events/second
18:17:26.602 [metrics-logger-reporter-1-thread-1] INFO
org.apache.jackrabbit.oak.metrics - type=TIMER, name=SESSION_READ_DURATION,
count=0, min=0.0, max=0.0, mean=0.0, stddev=0.0, median=0.0, p75=0.0, p95=0.0,
p98=0.0, p99=0.0, p999=0.0, mean_rate=0.0, m1=0.0, m5=0.0, m15=0.0,
rate_unit=events/second, duration_unit=microseconds
Oak-Tar 1 8 8 9 10 29
6536
{noformat}
So looks like we would need to disable the Metrics support for both read and
write and just live with default support as currently present
> Integrate with Metrics for various stats collection
> ----------------------------------------------------
>
> Key: OAK-3654
> URL: https://issues.apache.org/jira/browse/OAK-3654
> Project: Jackrabbit Oak
> Issue Type: New Feature
> Components: core
> Reporter: Chetan Mehrotra
> Assignee: Chetan Mehrotra
> Fix For: 1.3.12
>
> Attachments: OAK-3654-v1.patch, query-stats.png
>
>
> As suggested by [~ianeboston] in OAK-3478 current approach of collecting
> TimeSeries data is not easily consumable by other monitoring systems. Also
> just extracting the last moment data and exposing it in simple form would not
> be useful.
> Instead of that we should look into using Metrics library [1] for collecting
> metrics. To avoid having dependency on Metrics API all over in Oak we can
> come up with minimal interfaces which can be used in Oak and then provide an
> implementation backed by Metric.
> This task is meant to explore that aspect and come up with proposed changes
> to see if its feasible to make this change
> * metrics-core ~100KB in size with no dependency
> * ASL Licensee
> [1] http://metrics.dropwizard.io
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