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White space and formatting cleanup in the ChangeLog
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vasil 2009-09-18 03:59:30 +00:00
parent 866adf529d
commit 520500534a
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ChangeLog
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@ -1,12 +1,12 @@
2009-09-17 The InnoDB Team
* mysql-test/innodb-zip.result, mysql-test/innodb-zip.test:
Make the test pass with zlib 1.2.3.3. Apparently, the definition
Make the test pass with zlib 1.2.3.3. Apparently, the definition
of compressBound() has changed between zlib versions, and the
maximum record size of a table with 1K compressed page size has
been reduced by one byte. This is an arbitrary test. In
practical applications, for good write performance, the compressed
page size should be chosen to be bigger than the absolute minimum.
been reduced by one byte. This is an arbitrary test. In practical
applications, for good write performance, the compressed page size
should be chosen to be bigger than the absolute minimum.
2009-09-16 The InnoDB Team
@ -45,29 +45,29 @@
* row/row0merge.c:
Fix a bug in the merge sort that can corrupt indexes in fast index
creation. Add some consistency checks. Check that the number of
creation. Add some consistency checks. Check that the number of
records remains constant in every merge sort pass.
2009-08-27 The InnoDB Team
* buf/buf0buf.c, buf/buf0lru.c, buf/buf0rea.c,
handler/ha_innodb.cc, include/buf0buf.h, include/buf0buf.ic,
include/buf0lru.h, include/ut0ut.h, ut/ut0ut.c:
* buf/buf0buf.c, buf/buf0lru.c, buf/buf0rea.c, handler/ha_innodb.cc,
include/buf0buf.h, include/buf0buf.ic, include/buf0lru.h,
include/ut0ut.h, ut/ut0ut.c:
Make it possible to tune the buffer pool LRU eviction policy to be
more resistant against index scans. Introduce the settable global
more resistant against index scans. Introduce the settable global
variables innodb_old_blocks_pct and innodb_old_blocks_time for
controlling the buffer pool eviction policy. The parameter
controlling the buffer pool eviction policy. The parameter
innodb_old_blocks_pct (5..95) controls the desired amount of "old"
blocks in the LRU list. The default is 37, corresponding to the
old fixed ratio of 3/8. Each time a block is accessed, it will be
blocks in the LRU list. The default is 37, corresponding to the
old fixed ratio of 3/8. Each time a block is accessed, it will be
moved to the "new" blocks if its first access was at least
innodb_old_blocks_time milliseconds ago (default 0, meaning every
block). The idea is that in index scans, blocks will be accessed
block). The idea is that in index scans, blocks will be accessed
a few times within innodb_old_blocks_time, and they will remain in
the "old" section of the LRU list. Thus, when
innodb_old_blocks_time is nonzero, blocks retrieved for one-time
index scans will be more likely candidates for eviction than
blocks that are accessed in random patterns.
the "old" section of the LRU list. Thus, when innodb_old_blocks_time
is nonzero, blocks retrieved for one-time index scans will be more
likely candidates for eviction than blocks that are accessed in
random patterns.
2009-08-26 The InnoDB Team