mariadb

Tree: 77017191de

unknown 77017191de WL#3071 - Maria checkpoint - serializing calls to flush_pagecache_blocks_int() on the same file to avoid known concurrency bugs - having that, we can now enable the background thread, as the flushes it does are now supposedly safe in concurrent situations. - new type of flush FLUSH_KEEP_LAZY: when the background checkpoint thread is flushing a packet of dirty pages between two checkpoints, it uses this flush type, indeed if a file is already being flushed by another thread it's smarter to move on to the next file than wait. - maria_checkpoint_frequency renamed to maria_checkpoint_interval. include/my_sys.h: new type of flushing for the page cache: FLUSH_KEEP_LAZY mysql-test/r/maria.result: result update mysys/mf_keycache.c: indentation. No FLUSH_KEEP_LAZY support in key cache. storage/maria/ha_maria.cc: maria_checkpoint_frequency was somehow a hidden part of the Checkpoint API and that was not good. Now we have checkpoint_interval, local to ha_maria.cc, which serves as container for the user-visible maria_checkpoint_interval global variable; setting it calls update_checkpoint_interval which passes the new value to ma_checkpoint_init(). There is no hiding anymore. By default, enable background thread which does checkpoints every 30 seconds, and dirty page flush in between. That thread takes a checkpoint when it ends, so no need for maria_hton_panic to take one. The \| is \| and not \|\|, because maria_panic() must always be called. frequency->interval. storage/maria/ma_checkpoint.c: Use FLUSH_KEEP_LAZY for background thread when it flushes packets of dirty pages between two checkpoints: it is smarter to move on to the next file than wait for it to have been completely flushed, which may take long. Comments about flush concurrency bugs moved from ma_pagecache.c. Removing out-of-date comment. frequency->interval. create_background_thread -> (interval>0). In ma_checkpoint_background(), some variables need to be preserved between iterations. storage/maria/ma_checkpoint.h: new prototype storage/maria/ma_pagecache.c: - concurrent calls of flush_pagecache_blocks_int() on the same file cause bugs (see @note in that function); we fix them by serializing in this situation. For that we use a global hash of (file, wqueue). When flush_pagecache_blocks_int() starts it looks into the hash, using the file as key. If not found, it inserts (file,wqueue) into the hash, flushes the file, and finally removes itself from the hash and wakes up any waiter in the queue. If found, it adds itself to the wqueue and waits. - As a by-product, we can remove changed_blocks_is_incomplete and replace it by scanning the hash, replace the sleep() by a queue wait. - new type of flush FLUSH_KEEP_LAZY: when flushing a file, if it's already being flushed by another thread (even partially), return immediately. storage/maria/ma_pagecache.h: In pagecache, a hash of files currently being flushed (i.e. there is a call to flush_pagecache_blocks_int() for them). storage/maria/ma_recovery.c: new prototype storage/maria/ma_test1.c: new prototype storage/maria/ma_test2.c: new prototype		18 years ago
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atomic	Merge gbichot3.local:/home/mysql_src/mysql-5.1-for-maria	19 years ago
mysql	Never access thd->ha_data directly, use getters/setters from the plugin	18 years ago
.cvsignore	Import changeset	26 years ago
Makefile.am	Merge hynda.mysql.fi:/home/my/mysql-5.1-main	18 years ago
base64.h	Merge mysql.com:/home/kent/bk/main/mysql-5.0	19 years ago
config-netware.h	Many files:	19 years ago
config-win.h	Bug #30639: limit offset,rowcount wraps when rowcount >= 2^32 in windows	18 years ago
decimal.h	WL#3817: Simplify string / memory area types and make things more consistent (first part)	19 years ago
errmsg.h	Added more descriptive error message of why statement was automaticly dropped	19 years ago
ft_global.h	Merge jamppa@bk-internal.mysql.com:/home/bk/mysql-5.1	19 years ago
hash.h	Merge jamppa@bk-internal.mysql.com:/home/bk/mysql-5.1	19 years ago
heap.h	Added support for 'internal temporary tables' in HEAP tables.	19 years ago
help_end.h	my_strtoll10-x86.s:	19 years ago
help_start.h	my_strtoll10-x86.s:	19 years ago
keycache.h	Merge hynda.mysql.fi:/home/my/mysql-5.1-main	18 years ago
lf.h	Merged with mysql-5.1 main tree.	19 years ago
m_ctype.h	Merge bk-internal.mysql.com:/home/bk/mysql-5.1	19 years ago
m_string.h	Merge hynda.mysql.fi:/home/my/mysql-5.1-main	18 years ago
maria.h	WL#3071 - Maria checkpoint	18 years ago
my_aes.h	my_strtoll10-x86.s:	19 years ago
my_alarm.h	Many files:	19 years ago
my_alloc.h	WL#3817: Simplify string / memory area types and make things more consistent (first part)	19 years ago
my_atomic.h	This patch is a collection of patches from from Sanja, Sergei and Monty.	19 years ago
my_attribute.h	Bug#25118 ATTRIBUTE_FORMAT_FPTR undeclared in m_ctype.h	19 years ago
my_base.h	Merge hynda.mysql.fi:/home/my/mysql-5.1-main	18 years ago
my_bit.h	push for trnman review	19 years ago
my_bitmap.h	Merge dl145h.mysql.com:/data0/mkindahl/mysql-5.1-main	19 years ago
my_dbug.h	Merge jamppa@bk-internal.mysql.com:/home/bk/mysql-5.1	19 years ago
my_dir.h	Many files:	19 years ago
my_getopt.h	Slow query log to file now displays queries with microsecond precission	19 years ago
my_global.h	Merge hynda.mysql.fi:/home/my/mysql-5.1-main	18 years ago
my_handler.h	Fixed REPAIR/CHECK/ANALYZE TABLE for tables with new BLOCK-ROW format.	19 years ago
my_libwrap.h	Many files:	19 years ago
my_list.h	WL#3817: Simplify string / memory area types and make things more consistent (first part)	19 years ago
my_md5.h	Avoid the name conflict between the system-provided "md5.h" and the MySQL one	19 years ago
my_net.h	Merge mysql.com:/home/kent/bk/main/mysql-5.0	19 years ago
my_no_pthread.h	Merge mysql.com:/home/kent/bk/main/mysql-5.0	19 years ago
my_nosys.h	WL#3817: Simplify string / memory area types and make things more consistent (first part)	19 years ago
my_pthread.h	Merge gkodinov@bk-internal.mysql.com:/home/bk/mysql-5.1-opt	18 years ago
my_sys.h	WL#3071 - Maria checkpoint	18 years ago
my_time.h	Merge jamppa@bk-internal.mysql.com:/home/bk/mysql-5.1	19 years ago
my_tree.h	WL#3817: Simplify string / memory area types and make things more consistent (first part)	19 years ago
my_trie.h	WL#3817: Simplify string / memory area types and make things more consistent (first part)	19 years ago
my_uctype.h	Many files:	19 years ago
my_user.h	WL#3817: Simplify string / memory area types and make things more consistent (first part)	19 years ago
my_vle.h	WL#3817: Simplify string / memory area types and make things more consistent (first part)	19 years ago
my_xml.h	WL#3817: Simplify string / memory area types and make things more consistent (first part)	19 years ago
myisam.h	Merge hynda.mysql.fi:/home/my/mysql-5.1-main	18 years ago
myisamchk.h	Merged with mysql-5.1 main tree.	19 years ago
myisammrg.h	WL#3817: Simplify string / memory area types and make things more consistent (first part)	19 years ago
myisampack.h	Many files:	19 years ago
mysql.h	Merge bk-internal:/home/bk/mysql-5.1-marvel	19 years ago
mysql_com.h	Add 'extension' field to all client library structures to make them extensible	19 years ago
mysql_embed.h	Many files:	19 years ago
mysql_h.ic	Enable abi_check for 5.1	18 years ago
mysql_time.h	my_strtoll10-x86.s:	19 years ago
mysql_version.h.in	Merge with 4.0 to get fixes for Windows project files	22 years ago
mysys_err.h	WL#2936	19 years ago
queues.h	WL#3817: Simplify string / memory area types and make things more consistent (first part)	19 years ago
rijndael.h	my_strtoll10-x86.s:	19 years ago
sha1.h	my_strtoll10-x86.s:	19 years ago
sql_common.h	WL#3817: Simplify string / memory area types and make things more consistent (first part)	19 years ago
sslopt-case.h	Many files:	19 years ago
sslopt-longopts.h	WL#3817: Simplify string / memory area types and make things more consistent (first part)	19 years ago
sslopt-vars.h	Many files:	19 years ago
t_ctype.h	Many files:	19 years ago
thr_alarm.h	restored run-time thread lib detection	19 years ago
thr_lock.h	Merge olga.mysql.com:/home/igor/mysql-5.0-opt	19 years ago
typelib.h	Merge bk-internal.mysql.com:/home/bk/mysql-5.1-engines	19 years ago
violite.h	Merge pippilotta.erinye.com:/shared/home/df/mysql/build/mysql-5.0-build	19 years ago
wqueue.h	postreview changes for page cache and pre review commit for loghandler	19 years ago