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Type:
Improvement
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Status: Open
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Priority:
Major - P3
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Resolution: Unresolved
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Affects Version/s: None
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Fix Version/s: 4.3 Required
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Component/s: None
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Labels:None
Checkpoint can probably be made more efficient using the minimum modification timestamp, by using that value to determine if checkpoint is required to visit a page.
If the minimum modification timestamp is less than the stable timestamp then checkpoint should visit the page, otherwise it shouldn't.
I believe the relevant check is in bt_sync.c around line 246.
/*
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* Skip clean pages, but need to make sure maximum transaction ID is always updated.
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*/
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if (!__wt_page_is_modified(walk->page)) { |
if (((mod = walk->page->modify) != NULL) && mod->rec_max_txn > btree->rec_max_txn) |
btree->rec_max_txn = mod->rec_max_txn;
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if (mod != NULL && btree->rec_max_timestamp < mod->rec_max_timestamp) |
btree->rec_max_timestamp = mod->rec_max_timestamp;
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continue; |
}
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- depends on
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- Open
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