Dead Page Reference Count Bug Fix #181
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bhaskarbora2
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This MR is to release the fix for ref count bug in page recycler's dead page recycling flow. This issue crops up when volume trimmer and page recycler retries a dead page recycling task for a page after recovery. The solution is to track largest_slot_offset in recycler which will be checked at the time of receiving any new dead_page recycling request from volume trimmer. Any request having lower or equal slot_offset compare to largest-slot-offset will be ignored.
The MR also adds in a histogram plot to show where all we are hitting the bug over the entire seed range. This is done through an existing page ref count test.
#13