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MariaDB server is a community developed fork of MySQL server. Started by core members of the original MySQL team, MariaDB actively works with outside developers to deliver the most featureful, stable, and sanely licensed open SQL server in the industry.
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unknown c12c382fc6 This ChangeSet must be null-merged to 5.1. Applied innodb-5.0-ss982, -ss998, -ss1003 
Fixes:
- Bug #15815: Very poor performance with multiple queries running concurrently
- Bug #22868: 'Thread thrashing' with > 50 concurrent conns under an upd-intensive workloadw
- Bug #23769: Debug assertion failure with innodb_locks_unsafe_for_binlog
- Bug #24089: Race condition in fil_flush_file_spaces()


innobase/buf/buf0buf.c:
  Applied innodb-5.0-ss982, -ss998, -ss1003
  
  Revision r1000:
  branches/5.0: Merge r999 from trunk:
  
  Reduce buffer pool mutex contention under >= 4 big concurrent
  CPU-bound SELECT queries.  (Bug #22868)
  
  Fix: replace the mutex by one mutex protecting the 'flush list'
  (and the free list) and several mutexes protecting portions of the
  buffer pool, where we keep several indivudual LRU lists of pages.
  
  This patch is from Sunny Bains and Heikki Tuuri.
innobase/buf/buf0flu.c:
  Applied innodb-5.0-ss982, -ss998, -ss1003
  
  Revision r1000:
  branches/5.0: Merge r999 from trunk:
  
  Reduce buffer pool mutex contention under >= 4 big concurrent
  CPU-bound SELECT queries.  (Bug #22868)
  
  Fix: replace the mutex by one mutex protecting the 'flush list'
  (and the free list) and several mutexes protecting portions of the
  buffer pool, where we keep several indivudual LRU lists of pages.
  
  This patch is from Sunny Bains and Heikki Tuuri.
innobase/buf/buf0lru.c:
  Applied innodb-5.0-ss982, -ss998, -ss1003
  
  Revision r1000:
  branches/5.0: Merge r999 from trunk:
  
  Reduce buffer pool mutex contention under >= 4 big concurrent
  CPU-bound SELECT queries.  (Bug #22868)
  
  Fix: replace the mutex by one mutex protecting the 'flush list'
  (and the free list) and several mutexes protecting portions of the
  buffer pool, where we keep several indivudual LRU lists of pages.
  
  This patch is from Sunny Bains and Heikki Tuuri.
innobase/dict/dict0crea.c:
  Applied innodb-5.0-ss982, -ss998, -ss1003
  
  Revision r974:
  branches/5.0: Port r973 from trunk.
  
  Do not break the latching order in TRUNCATE TABLE.
  
  dict_truncate_index_tree(): Replace parameter rec_t* rec with
  btr_pcur_t* pcur.  Reposition pcur before calling btr_create().
  
  sync_thread_add_level(): Remove the relaxation of the assertion added in r968.
innobase/fil/fil0fil.c:
  Applied innodb-5.0-ss982, -ss998, -ss1003
  
  Revision r1003:
  branches/5.0: Merge r1002 from trunk:
  
  fil_flush_file_spaces(): Copy the system->unflushed_spaces list to an
  array while holding the mutex.  This removes the crash-triggering
  race condition that was introduced when fixing Bug 15653.  (Bug #24089)
innobase/include/buf0buf.h:
  Applied innodb-5.0-ss982, -ss998, -ss1003
  
  Revision r1000:
  branches/5.0: Merge r999 from trunk:
  
  Reduce buffer pool mutex contention under >= 4 big concurrent
  CPU-bound SELECT queries.  (Bug #22868)
  
  Fix: replace the mutex by one mutex protecting the 'flush list'
  (and the free list) and several mutexes protecting portions of the
  buffer pool, where we keep several indivudual LRU lists of pages.
  
  This patch is from Sunny Bains and Heikki Tuuri.
innobase/include/buf0buf.ic:
  Applied innodb-5.0-ss982, -ss998, -ss1003
  
  Revision r1000:
  branches/5.0: Merge r999 from trunk:
  
  Reduce buffer pool mutex contention under >= 4 big concurrent
  CPU-bound SELECT queries.  (Bug #22868)
  
  Fix: replace the mutex by one mutex protecting the 'flush list'
  (and the free list) and several mutexes protecting portions of the
  buffer pool, where we keep several indivudual LRU lists of pages.
  
  This patch is from Sunny Bains and Heikki Tuuri.
innobase/include/dict0crea.h:
  Applied innodb-5.0-ss982, -ss998, -ss1003
  
  Revision r974:
  branches/5.0: Port r973 from trunk.
  
  Do not break the latching order in TRUNCATE TABLE.
  
  dict_truncate_index_tree(): Replace parameter rec_t* rec with
  btr_pcur_t* pcur.  Reposition pcur before calling btr_create().
  
  sync_thread_add_level(): Remove the relaxation of the assertion added in r968.
innobase/include/sync0arr.h:
  Applied innodb-5.0-ss982, -ss998, -ss1003
  
  Revision r1001:
  branches/5.0: Reduce locking contention:
  
  Bug #15815: 'Thread thrashing' with > 50 concurrent connections under
  an update-intensive workload.
  Fix: Introduce one event per InnoDB semaphore.
  
  This patch is from Sunny Bains and Heikki Tuuri.
  This patch will not be merged to trunk (MySQL/InnoDB 5.1) yet,
  because it tries to address the problem in a different way.
innobase/include/sync0rw.h:
  Applied innodb-5.0-ss982, -ss998, -ss1003
  
  Revision r1001:
  branches/5.0: Reduce locking contention:
  
  Bug #15815: 'Thread thrashing' with > 50 concurrent connections under
  an update-intensive workload.
  Fix: Introduce one event per InnoDB semaphore.
  
  This patch is from Sunny Bains and Heikki Tuuri.
  This patch will not be merged to trunk (MySQL/InnoDB 5.1) yet,
  because it tries to address the problem in a different way.
innobase/include/sync0rw.ic:
  Applied innodb-5.0-ss982, -ss998, -ss1003
  
  Revision r1001:
  branches/5.0: Reduce locking contention:
  
  Bug #15815: 'Thread thrashing' with > 50 concurrent connections under
  an update-intensive workload.
  Fix: Introduce one event per InnoDB semaphore.
  
  This patch is from Sunny Bains and Heikki Tuuri.
  This patch will not be merged to trunk (MySQL/InnoDB 5.1) yet,
  because it tries to address the problem in a different way.
innobase/include/sync0sync.h:
  Applied innodb-5.0-ss982, -ss998, -ss1003
  
  Revision r1001:
  branches/5.0: Reduce locking contention:
  
  Bug #15815: 'Thread thrashing' with > 50 concurrent connections under
  an update-intensive workload.
  Fix: Introduce one event per InnoDB semaphore.
  
  This patch is from Sunny Bains and Heikki Tuuri.
  This patch will not be merged to trunk (MySQL/InnoDB 5.1) yet,
  because it tries to address the problem in a different way.
innobase/os/os0sync.c:
  Applied innodb-5.0-ss982, -ss998, -ss1003
  
  Revision r1001:
  branches/5.0: Reduce locking contention:
  
  Bug #15815: 'Thread thrashing' with > 50 concurrent connections under
  an update-intensive workload.
  Fix: Introduce one event per InnoDB semaphore.
  
  This patch is from Sunny Bains and Heikki Tuuri.
  This patch will not be merged to trunk (MySQL/InnoDB 5.1) yet,
  because it tries to address the problem in a different way.
innobase/row/row0mysql.c:
  Applied innodb-5.0-ss982, -ss998, -ss1003
  
  Revision r974:
  branches/5.0: Port r973 from trunk.
  
  Do not break the latching order in TRUNCATE TABLE.
  
  dict_truncate_index_tree(): Replace parameter rec_t* rec with
  btr_pcur_t* pcur.  Reposition pcur before calling btr_create().
  
  sync_thread_add_level(): Remove the relaxation of the assertion added in r968.
innobase/row/row0sel.c:
  Applied innodb-5.0-ss982, -ss998, -ss1003
  
  Revision r982:
  branches/5.0: row_sel(): Do not try to acquire a LOCK_REC_NOT_GAP lock
  on the supremum record.  Instead, skip to the next record.  (Bug #23769)
  This fix was backported from r623 in the 5.1 tree.
innobase/srv/srv0start.c:
  Applied innodb-5.0-ss982, -ss998, -ss1003
  
  Revision r926:
  Refer to bug: 22268. Since no one tries to run 5.0 on Windows 95/ME it was
  decided to raise the limit of srv_max_n_threads to 10000 on Windows.
innobase/sync/sync0arr.c:
  Applied innodb-5.0-ss982, -ss998, -ss1003
  
  Revision r1001:
  branches/5.0: Reduce locking contention:
  
  Bug #15815: 'Thread thrashing' with > 50 concurrent connections under
  an update-intensive workload.
  Fix: Introduce one event per InnoDB semaphore.
  
  This patch is from Sunny Bains and Heikki Tuuri.
  This patch will not be merged to trunk (MySQL/InnoDB 5.1) yet,
  because it tries to address the problem in a different way.
innobase/sync/sync0rw.c:
  Applied innodb-5.0-ss982, -ss998, -ss1003
  
  Revision r1001:
  branches/5.0: Reduce locking contention:
  
  Bug #15815: 'Thread thrashing' with > 50 concurrent connections under
  an update-intensive workload.
  Fix: Introduce one event per InnoDB semaphore.
  
  This patch is from Sunny Bains and Heikki Tuuri.
  This patch will not be merged to trunk (MySQL/InnoDB 5.1) yet,
  because it tries to address the problem in a different way.
innobase/sync/sync0sync.c:
  Applied innodb-5.0-ss982, -ss998, -ss1003
  
  Revision r969:
  branches/5.0: Port r968 from trunk:
  
  sync_thread_add_level(): When level == SYNC_TREE_NODE, allow the latching
  order to be violated if the thread holds dict_operation_lock, whose level is
  SYNC_DICT_OPERATION.  This removes the assertion failure of TRUNCATE TABLE
  #ifdef UNIV_SYNC_DEBUG.
  
  
  Revision r974:
  branches/5.0: Port r973 from trunk.
  
  Do not break the latching order in TRUNCATE TABLE.
  
  dict_truncate_index_tree(): Replace parameter rec_t* rec with
  btr_pcur_t* pcur.  Reposition pcur before calling btr_create().
  
  sync_thread_add_level(): Remove the relaxation of the assertion added in r968.
  
  
  Revision r1001:
  branches/5.0: Reduce locking contention:
  
  Bug #15815: 'Thread thrashing' with > 50 concurrent connections under
  an update-intensive workload.
  Fix: Introduce one event per InnoDB semaphore.
  
  This patch is from Sunny Bains and Heikki Tuuri.
  This patch will not be merged to trunk (MySQL/InnoDB 5.1) yet,
  because it tries to address the problem in a different way.
2006-11-09 05:02:37 +01:00
bdb make dist changes for Cmake build 2006-09-01 10:32:12 +02:00
BitKeeper Merge zippy.cornsilk.net:/home/cmiller/work/mysql/bug23411/my41-bug23411 2006-11-06 17:45:47 -05:00
BUILD Merge perch.ndb.mysql.com:/home/jonas/src/mysql-4.1 2006-09-05 15:05:52 +02:00
client Fix warnings and NetWare compile failure 2006-11-09 00:17:22 +01:00
cmd-line-utils Merge neptunus.(none):/home/msvensson/mysql/bug16557/my50-bug16557 2006-02-21 08:58:19 +01:00
config/ac-macros Use a direct reference to the yassl and taocrypt libtool libraries to link with 2006-09-21 11:37:08 +02:00
dbug make dist changes for Cmake build 2006-09-01 10:32:12 +02:00
Docs Merge mysql.com:/Users/kent/mysql/bk/lic/my41-lic 2006-11-07 22:55:19 +01:00
extra Netware uses size_t as socklen_t 2006-10-23 13:26:04 +02:00
heap make dist changes for Cmake build 2006-09-01 10:32:12 +02:00
include Merge bk-internal:/home/bk/mysql-5.0 2006-11-08 11:40:33 +01:00
innobase This ChangeSet must be null-merged to 5.1. Applied innodb-5.0-ss982, -ss998, -ss1003 2006-11-09 05:02:37 +01:00
libmysql make dist changes for Cmake build 2006-09-01 10:32:12 +02:00
libmysql_r Bug#19575 MySQL-shared-5.0.21-0.glibc23 causes segfault in SSL_library_init 2006-05-31 16:19:06 +02:00
libmysqld Bug #23427: incompatible ABI change in 5.0.26? 2006-10-20 17:17:24 -04:00
man Makefile.am, configure.in: 2006-07-28 23:12:40 +02:00
myisam Merge neptunus.(none):/home/msvensson/mysql/mysql-4.1-maint 2006-11-03 16:18:32 +01:00
myisammrg Merge shellback.(none):/home/msvensson/mysql/mysql-5.0 2006-10-03 01:01:06 +02:00
mysql-test Merge quadxeon.mysql.com:/benchmarks/ext3/TOSAVE/tsmith/bk/g50 2006-11-09 00:26:22 +01:00
mysys Fix merge collision. 2006-11-02 18:27:52 -05:00
ndb Merge bodhi.local:/opt/local/work/mysql-4.1-runtime 2006-11-02 02:38:41 +03:00
netware Replace all refernces to .la libraries with direct references 2006-10-24 13:12:34 +02:00
os2 Merge 2005-09-29 03:20:31 +02:00
pstack Makefile.am, configure.in: 2005-09-24 15:51:45 +02:00
regex make dist changes for Cmake build 2006-09-01 10:32:12 +02:00
scripts Merge mysql.com:/Users/kent/mysql/bk/lic/my41-lic 2006-11-07 22:55:19 +01:00
server-tools Instance Manager polishing. 2006-10-20 22:26:40 +04:00
sql Merge quadxeon.mysql.com:/benchmarks/ext3/TOSAVE/tsmith/bk/g50 2006-11-09 00:26:22 +01:00
sql-bench Set thread_stack after return from end_thread() 2005-12-03 18:13:06 +02:00
sql-common Merge alik.:/mnt/raid/alik/MySQL/devel/5.0-rt 2006-11-07 13:45:56 +03:00
SSL Remove client-req-pem and server-req.pem 2006-05-03 11:53:16 +02:00
strings Merge bk@192.168.21.1:mysql-4.1 2006-10-12 13:50:22 +05:00
support-files Merge mysql.com:/Users/kent/mysql/bk/bug17194/my50-bug17194 2006-08-24 14:51:54 +02:00
tests Merge bk-internal.mysql.com:/home/bk/mysql-4.1 2006-11-02 17:27:42 -05:00
tools Bug#19575 MySQL-shared-5.0.21-0.glibc23 causes segfault in SSL_library_init 2006-05-31 16:19:06 +02:00
VC++Files Merge kboortz@bk-internal.mysql.com:/home/bk/mysql-5.0 2006-08-06 16:47:49 +02:00
vio Bug#23981 memory leaks from yassl code + other 2006-11-07 15:20:24 +01:00
win Additional files for cmake support 2006-08-31 19:52:42 +02:00
zlib Merge rkalimullin@bk-internal.mysql.com:/home/bk/mysql-5.0-maint 2006-09-18 10:37:26 +05:00
.bzrignore Merge neptunus.(none):/home/msvensson/mysql/mysql-4.1-maint 2006-10-24 21:05:35 +02:00
.cvsignore Import changeset 2000-07-31 21:29:14 +02:00
CMakeLists.txt Merge mysql.com:/Users/kent/mysql/bk/mysql-5.0.27-release 2006-10-21 01:13:50 +02:00
configure.in Merge bk-internal:/home/bk/mysql-5.0 2006-11-08 11:40:33 +01:00
COPYING - manual.texi will be replaced with a manual written in DocBook/XML. This ChangeSet removes all 2005-04-13 11:51:38 +02:00
Makefile.am Merge shellback.(none):/home/msvensson/mysql/mysql-5.0 2006-10-14 17:31:04 +02:00
README make_binary_distribution.sh: 2006-11-07 22:26:37 +01:00

README 

This is a release of MySQL, a dual-license SQL database server.
MySQL is brought to you by the MySQL team at MySQL AB.

License information can be found in these files:
- For GPL (free) distributions, see the COPYING file and
  the EXCEPTIONS-CLIENT file.
- For commercial distributions, see the LICENSE.mysql file.


For further information about MySQL or additional documentation, see:
- The latest information about MySQL: http://www.mysql.com
- The current MySQL documentation: http://dev.mysql.com/doc

Some manual sections of special interest:

- If you are migrating from an older version of MySQL, please read the
  "Upgrading from..." section first!
- To see what MySQL can do, take a look at the features section.
- For installation instructions, see the Installing and Upgrading chapter.
- For the new features/bugfix history, see the Change History appendix.
- For the currently known bugs/misfeatures (known errors) see the Problems
  and Common Errors appendix.
- For a list of developers and other contributors, see the Credits
  appendix.

A local copy of the MySQL Reference Manual can be found in the Docs
directory in GNU Info format.  You can also browse the manual online or
download it in any of several formats at the URL given earlier in this
file.

************************************************************

IMPORTANT:

Bug or error reports should be sent to http://bugs.mysql.com.