Revision 3e7e269292e60c51331839ac00cea409a0439d1d authored by Mark Callaghan on 29 October 2012, 19:04:27 UTC, committed by Mark Callaghan on 30 October 2012, 14:21:37 UTC
Summary: This makes the stall timers in MakeRoomForWrite more accurate by timing the sleeps. From looking at the logs the real sleep times are usually about 2000 usecs each when SleepForMicros(1000) is called. The modified LOG messages are: 2012/10/29-12:06:33.271984 2b3cc872f700 delaying write 13 usecs for level0_slowdown_writes_trigger 2012/10/29-12:06:34.688939 2b3cc872f700 delaying write 1728 usecs for rate limits with max score 3.83 Task ID: # Blame Rev: Test Plan: run db_bench, look at DB/LOG Revert Plan: Database Impact: Memcache Impact: Other Notes: EImportant: - begin *PUBLIC* platform impact section - Bugzilla: # - end platform impact - Reviewers: dhruba Reviewed By: dhruba Differential Revision: https://reviews.facebook.net/D6297
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NEWS
Release 1.2 2011-05-16
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Fixes for larger databases (tested up to one billion 100-byte entries,
i.e., ~100GB).
(1) Place hard limit on number of level-0 files. This fixes errors
of the form "too many open files".
(2) Fixed memtable management. Before the fix, a heavy write burst
could cause unbounded memory usage.
A fix for a logging bug where the reader would incorrectly complain
about corruption.
Allow public access to WriteBatch contents so that users can easily
wrap a DB.
Computing file changes ...
