[Kde-pim] Review Request 117471: ItemSync: Use batch processing and allow throttling

[Christian Mollekopf]

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This is an automatically generated e-mail. To reply, visit:
https://git.reviewboard.kde.org/r/117471/
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Review request for KDEPIM-Libraries.


Repository: kdepimlibs


Description
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ItemSync: Use batch processing and allow throttling

With this patch we process the items in batches and gives resources the
possiblity to throttle the retrieval of messages using the
readyForNextBatch signal. This way we avoid using huge queries and
loading all items into memory, making the whole process a lot less
resource intensive, and make it work for large folder.


Diffs
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  akonadi/itemsync.h 32166d7154b0a9a5131b0dd215c0a5a75b2a67dd 
  akonadi/itemsync.cpp 421c14a027836800bab1e62ca466d68475c71e1f 
  akonadi/resourcebase.h 01f86a84c5fd78b8dfcabf638a881759b159f04c 
  akonadi/resourcebase.cpp 4e5b1e9289d1cbfba42490961dab78ebaad8a586 
  akonadi/tests/itemsynctest.cpp 4999c03abb25f3e1cf767b287dcf7698693745e9 

Diff: https://git.reviewboard.kde.org/r/117471/diff/


Testing
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I adapted the imap resource accordingly and I can now sync 200k mail folder with the bottleneck being mysql (as it should) and no significant cpu or memory usage by akonadi-server or the imap resource. Also, unittests. 


Thanks,

Christian Mollekopf

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