Configureable slow query threshold

[ldangeard-orange]

To configure slow query threshold, I add a long_query_time property to adjust the value at best.
By default, 10s is too long for a transactional type application. The value can be specified to a resolution of microseconds.
Slow queries are log in /var/vcap/sys/log/mysql/mysql_slow_query.log.

/CC @axelfauvel @gberche-orange

[cfdreddbot]

Hey ldangeard-orange!

Thanks for submitting this pull request!

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[cf-gitbot]

We have created an issue in Pivotal Tracker to manage this:

https://www.pivotaltracker.com/story/show/151987215

The labels on this github issue will be updated when the story is started.

[menicosia]

Hi @alexjh @gberche-orange,

Thank you for contributing this!

This suggestion seems to make sense, I've prioritized it for the team to look into merging it soon-ish. (We're currently super occupied with the TLS epic.) They may have some feedback, or wish to do some additional work to make sure it's represented in CI.

--
Marco Nicosia
Product Manager
Pivotal Software, Inc.

[gberche-orange]

Thanks Marco!

[gberche-orange]

sorry that we overlooked running the unit tests and updating the my.cnf.erb.shasum
we'll push new commits to fix this.

/CC @ldangeard-orange

[gberche-orange]

@menicosia BTW, is there a public CI for the mysql (as we would try to run a copy of the cf-mysql-ci prior to submitting our PR) ? I have run into https://core-services.ci.cf-app.com/ but can't see any public pipelines there yet.

[jpalermo]

Hey @gberche-orange. Currently the CI is not public. cf-mysql-ci is open source, although the amount of infrastructure and setup needed to get it up and running would probably make it prohibitive to run the pipelines yourself.

(https://github.com/cloudfoundry-incubator/cf-mysql-ci) is more intended as a demonstration of how we run tests, and possibly some of the scripts in there are useful if you try to implement tests of your own.

[gberche-orange]

thanks @jpalermo for this clarification.

[gberche-orange]

Once you've publicized your membership, one of the owners of this repository can close and reopen this pull request, and dreddbot will take another look.

@ldangeard-orange is now covered by Orange CCLA as a public member of https://github.com/orange-cloudfoundry . Should be fine to retrigger the dreddbot by closing & reopening this issue.

[menicosia]

@ldangeard-orange @gberche-orange this will be included in v36.10.0

[gberche-orange]

thanks @menicosia and core services team!