Revision 36300fbbe3a7fde402152e4a57bbf5cda614d53c authored by Dmitri Smirnov on 01 February 2016, 21:14:37 UTC, committed by Dmitri Smirnov on 01 February 2016, 21:14:37 UTC
This change impacts only non-buffered I/O on Windows. Currently, there is a buffer per RandomAccessFile instance that is protected by a lock. The reason we maintain the buffer is non-buffered I/O requires an aligned buffer to work. XPerf traces demonstrate that we accumulate a considerable wait time while waiting for that lock. This change enables to set random access buffer size to zero which would indicate a per request allocation. We are expecting that allocation expense would be much less than I/O costs plus wait time due to the fact that the memory heap would tend to re-use page aligned allocations especially with the use of Jemalloc. This change does not affect buffer use as a read_ahead_buffer for compaction purposes.
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File | Mode | Size |
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arcanist_util | ||
build_tools | ||
coverage | ||
db | ||
doc | ||
examples | ||
hdfs | ||
include | ||
java | ||
memtable | ||
port | ||
table | ||
third-party | ||
tools | ||
util | ||
utilities | ||
.arcconfig | -rw-r--r-- | 564 bytes |
.clang-format | -rw-r--r-- | 138 bytes |
.gitignore | -rw-r--r-- | 622 bytes |
.travis.yml | -rw-r--r-- | 1.9 KB |
AUTHORS | -rw-r--r-- | 247 bytes |
CMakeLists.txt | -rw-r--r-- | 16.3 KB |
CONTRIBUTING.md | -rw-r--r-- | 733 bytes |
DUMP_FORMAT.md | -rw-r--r-- | 763 bytes |
HISTORY.md | -rw-r--r-- | 30.1 KB |
INSTALL.md | -rw-r--r-- | 3.9 KB |
LICENSE | -rw-r--r-- | 1.6 KB |
Makefile | -rw-r--r-- | 41.0 KB |
PATENTS | -rw-r--r-- | 1.9 KB |
README.md | -rw-r--r-- | 1.2 KB |
ROCKSDB_LITE.md | -rw-r--r-- | 1.0 KB |
USERS.md | -rw-r--r-- | 2.8 KB |
Vagrantfile | -rw-r--r-- | 862 bytes |
WINDOWS_PORT.md | -rw-r--r-- | 12.5 KB |
appveyor.yml | -rw-r--r-- | 462 bytes |
src.mk | -rw-r--r-- | 21.1 KB |
thirdparty.inc | -rw-r--r-- | 7.0 KB |
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