Revision 33323f21117e5bb8cf72569302f109aabb387bb9 authored by Mark Callaghan on 14 September 2012, 19:35:02 UTC, committed by Mark Callaghan on 14 September 2012, 23:43:50 UTC
Summary: Reads via mmap on concurrent workloads are much slower than pread. For example on a 24-core server with storage that can do 100k IOPS or more I can get no more than 10k IOPS with mmap reads and 32+ threads. Test Plan: db_bench benchmarks Reviewers: dhruba, heyongqiang Reviewed By: heyongqiang Differential Revision: https://reviews.facebook.net/D5433
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| File | Mode | Size |
|---|---|---|
| builder.cc | -rw-r--r-- | 2.2 KB |
| builder.h | -rw-r--r-- | 1.1 KB |
| c.cc | -rw-r--r-- | 17.4 KB |
| c_test.c | -rw-r--r-- | 11.1 KB |
| corruption_test.cc | -rw-r--r-- | 9.5 KB |
| db_bench.cc | -rw-r--r-- | 38.5 KB |
| db_impl.cc | -rw-r--r-- | 46.9 KB |
| db_impl.h | -rw-r--r-- | 7.3 KB |
| db_iter.cc | -rw-r--r-- | 7.9 KB |
| db_iter.h | -rw-r--r-- | 805 bytes |
| db_statistics.h | -rw-r--r-- | 683 bytes |
| db_stats_logger.cc | -rw-r--r-- | 2.3 KB |
| db_test.cc | -rw-r--r-- | 59.4 KB |
| dbformat.cc | -rw-r--r-- | 4.4 KB |
| dbformat.h | -rw-r--r-- | 6.7 KB |
| dbformat_test.cc | -rw-r--r-- | 3.7 KB |
| filename.cc | -rw-r--r-- | 5.4 KB |
| filename.h | -rw-r--r-- | 2.9 KB |
| filename_test.cc | -rw-r--r-- | 3.3 KB |
| log_format.h | -rw-r--r-- | 897 bytes |
| log_reader.cc | -rw-r--r-- | 7.8 KB |
| log_reader.h | -rw-r--r-- | 3.5 KB |
| log_test.cc | -rw-r--r-- | 12.8 KB |
| log_writer.cc | -rw-r--r-- | 2.8 KB |
| log_writer.h | -rw-r--r-- | 1.3 KB |
| memtable.cc | -rw-r--r-- | 4.7 KB |
| memtable.h | -rw-r--r-- | 2.7 KB |
| repair.cc | -rw-r--r-- | 11.7 KB |
| skiplist.h | -rw-r--r-- | 11.3 KB |
| skiplist_test.cc | -rw-r--r-- | 9.6 KB |
| snapshot.h | -rw-r--r-- | 1.6 KB |
| table_cache.cc | -rw-r--r-- | 3.7 KB |
| table_cache.h | -rw-r--r-- | 2.0 KB |
| version_edit.cc | -rw-r--r-- | 6.8 KB |
| version_edit.h | -rw-r--r-- | 3.0 KB |
| version_edit_test.cc | -rw-r--r-- | 1.3 KB |
| version_set.cc | -rw-r--r-- | 50.2 KB |
| version_set.h | -rw-r--r-- | 13.5 KB |
| version_set_test.cc | -rw-r--r-- | 5.2 KB |
| write_batch.cc | -rw-r--r-- | 3.9 KB |
| write_batch_internal.h | -rw-r--r-- | 1.5 KB |
| write_batch_test.cc | -rw-r--r-- | 3.4 KB |
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