swh:1:snp:5115096b921df712aeb2a08114fede57fb3331fb
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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Tip revision: 19076c95aa2bcee55c26fcf0960cc844ad86ee9c authored by Levi Tamasi on 21 January 2021, 22:18:25 UTC
Update HISTORY.md for PR 7888 (#7890)
Update HISTORY.md for PR 7888 (#7890)
Tip revision: 19076c9
| File | Mode | Size |
|---|---|---|
| db | ||
| doc | ||
| hdfs | ||
| helpers | ||
| include | ||
| port | ||
| scribe | ||
| snappy | ||
| table | ||
| thrift | ||
| tools | ||
| util | ||
| .arcconfig | -rw-r--r-- | 110 bytes |
| .gitignore | -rw-r--r-- | 61 bytes |
| AUTHORS | -rw-r--r-- | 193 bytes |
| LICENSE | -rw-r--r-- | 1.4 KB |
| Makefile | -rw-r--r-- | 8.7 KB |
| NEWS | -rw-r--r-- | 509 bytes |
| README | -rw-r--r-- | 1.7 KB |
| README.fb | -rw-r--r-- | 281 bytes |
| TODO | -rw-r--r-- | 494 bytes |
| build_detect_platform | -rwxr-xr-x | 7.6 KB |
| build_detect_version | -rwxr-xr-x | 1.1 KB |
| fbcode.gcc471.sh | -rw-r--r-- | 2.2 KB |
| fbcode.sh | -rw-r--r-- | 2.1 KB |
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