memory reduction most visible in HI processing, done mostly by dropping muon isodeposits in HI (same as #12764)

[slava77]

technical PR to reduce memory use, mainly driven by observations in complex events in HI workflows.

see details in 75X PR #12764)

tested in CMSSW_8_0_X_2015-12-11-1100: there are no differences compared to the baseline

[slava77]

@cmsbuild please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/10272/console

[cmsbuild]

A new Pull Request was created by @slava77 (Slava Krutelyov) for CMSSW_8_0_X.

It involves the following packages:

DQM/SiPixelMonitorTrack
DQMOffline/EGamma
DQMOffline/JetMET
DQMOffline/Muon
DQMOffline/Trigger
RecoEcal/EgammaCoreTools
RecoEgamma/EgammaPhotonProducers
RecoHI/HiMuonAlgos
RecoMuon/MuonIdentification
RecoMuon/MuonIsolationProducers
RecoParticleFlow/PFProducer

@cvuosalo, @cmsbuild, @deguio, @slava77, @vanbesien, @davidlange6 can you please review it and eventually sign? Thanks.
@TaiSakuma, @abbiendi, @rappoccio, @argiro, @echapon, @lgray, @threus, @mmarionncern, @battibass, @ahinzmann, @jhgoh, @dgulhan, @jdolen, @trocino, @yetkinyilmaz, @Sam-Harper, @barvic, @bellan, @nhanvtran, @schoef, @richard-cms, @mandrenguyen, @MiheeJo, @jazzitup, @yenjie, @kurtejung, @istaslis, @mariadalfonso, @rociovilar, @bachtis this is something you requested to watch as well.
@slava77, @Degano, @smuzaffar you are the release manager for this.

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[cmsbuild]

+1
Tested at: 1cf8480
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-12766/10272/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-12766/10272/summary.html

[slava77]

+1

for #12766 1cf8480

• jenkins tests confirm there are no changes in the monitored outputs

[deguio]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_8_0_X IBs (tests are also fine). This pull request requires discussion in the ORP meeting before it's merged. @slava77, @davidlange6, @Degano, @smuzaffar

[davidlange6]

+1