CPU memory increasing

Hi Every one,

we got an typical problem in our production Publisher instances(CQ 5.5) where CPU memory is getting increased to 60% in particular window 2 times a day. when we gone through log files we found that there are lot of index files, bundles version files, tar files getting generated. the path where it is getting generated is shown below

1. crx-quickstart\repository\workspaces\crx.default\index \...
2. crx-quickstart\launchpad\felix\ .....
3. crx-quickstart/repository/tarJournal/..

we googled and found apache Lucane indexing files will be stored under index folder (point 1 above),
Apache Felix Framework Bundle Cache is stored under launchpad\felix (point 2) AND Tar Persistance Manager is responsible for tar files generation.

what we dont understand is when CQ initiates this processes to run i.e., start indexing, start taking Bundle Cache, run tar persistance manager. Also we want to understand is there any link between all the three like on tar optimization running others like indexing and Bundle cache will be effected?

please let me know your response.