….41% 15534570 mysqld mysqld [.] rw_lock_x_lock_func(rw_lock_t*, unsigned long, char const*, unsigned long) | — rw_lock_x_lock_func(rw_lock_t*, unsigned long, char const…_schema=0 #56only loose-innodb_flush_neighbors=0 loose-metadata_locks_hash_instances=256 innodb_buffer_pool_instances=16 # MySQL 5…
Post: Improved InnoDB rw_lock patch
October 20, 2008 By 3 Comments
… also results with Yasufumi’s rw_locks (http://bugs.mysql.com/bug.php?id=26442) ThreadsStandard InnoDBGoogle smpfixYasufumi rw_lock 19700.2810601.969432.44… of Yasufumu’s rw_locks and you can download them there The results for the same benchmark: ThreadsStandard InnoDBYasufumi rw_lock ver 2 19700… for other workloads new rw_locks show results comparable with Google’s smpfix, so we will include innodb_rw_lock into our next -percona…
Post: Scaling problems still exist in MySQL 5.5 and Percona Server 5.5
May 20, 2011 By 11 Comments
…,os_event_wait_low,sync_array_wait_event,rw_lock_s_lock_spin,pfs_rw_lock_s_lock_fu nc,btr_search_build_page_hash_index…,os_event_wait_low,sync_array_wait_event,rw_lock_x_lock_func,pfs_rw_lock_x_lock_fu nc,btr_search_build_page_hash_index…,os_event_wait_low,sync_array_wait_event,rw_lock_s_lock_spin,pfs_rw_lock_s_lock_fu nc,btr_search_build_page_hash_index…
Comment: Returning to InnoDB scalability
September 13, 2006 By 42 Comments
… | 15352999 | 27614941 | 11730 | 9828 | 0 | | &rw_lock_list_mutex | sync0sync.c | 655575 | 0 | 0 | 0 | 0 | 0 | | rw_lock_mutexes | | 110855726270 | 1283069365 | 1479866288 | 1218471… | 1408322 | 3189846 | 10851 | 13615 | 0 | | &rw_lock_list_mutex | sync0sync.c | 655570 | 0 | 0 | 0 | 0 | 0 | | rw_lock_mutexes | | 3167689045 | 404334 | 1608628 | 6657…
Post: Helgrinding MySQL with InnoDB for Synchronisation Errors, Fun and Profit
November 24, 2011 By 2 Comments
…: sync_array_reserve_cell (sync0arr.c:366) ==9090== by 0x6BC917F: rw_lock_s_lock_spin (sync0rw.c:415) ==9090== by 0x6B6905A: log_checkpoint…:4504) The RW lock spin stats join the company of the buffer pool and I/O stats. ==9090== Thread #18: lock order “0xF14460… kind of error: lock order violation, thus a potential deadlock. The locks in question are LOCK_global_system_variables and LOCK_system_variables_hash…
Post: MyISAM concurrent insert
June 13, 2006 By 12 Comments
… range-queries. The reason of problems is POSIX read-write locks, which are used to protect key_buffer from concurrent changes… UC2006 talk, in short on main platforms (Linux, Solaris, Windows) rw-locks have a bad implementation and too many calls cause waste… the reason of bad scalability is rw-locks and currently MySQL developers are working on CPU-depended rw-locks implementstation, this will be available…
Comment: XtraDB storage engine release 1.0.3-4 codename Sakura
April 10, 2009 By 9 Comments
Seems to me the rw_lock issue is not fixed completely because I’m hitting a … line 508 for 241.00 seconds the semaphore: X-lock on RW-latch at fffffffc72f811f8 created in file buf/buf0buf.c line…_waiters flag 0, x_waiters flag 1, lock_word: 100000 Last time read locked in file btr/btr0cur.c line 508 Last…
Post: MySQL Binaries Percona build10
December 11, 2008 By 12 Comments
…_MS column | 1.0 | Percona | GPL | | | innodb_locks_held.patch | Add locks held, remove locked records in SHOW INNODB STATUS | 1.0 | Baron… pool scalability | 1.0 | Yasufumi Kinoshita | BSD | | | innodb_rw_lock.patch | Fix of InnoDB rw_locks | 1.0 | Yasufumi Kinoshita | BSD | You can download…
Post: Percona build7 with latest patches
November 14, 2008 By 26 Comments
…_MS column | 1.0 | Percona | GPL | | | innodb_locks_held.patch | Add locks held, remove locked records in SHOW INNODB STATUS | 1.0 | Baron… pool scalability | 1.0 | Yasufumi Kinoshita | BSD | | | innodb_rw_lock.patch | Fix of InnoDB rw_locks | 1.0 | Yasufumi Kinoshita | BSD | You can download…
Post: 5.0.87-build20 Percona binaries
November 18, 2009 By 3 Comments
…: The build is based on MySQL-5.0.87 innodb_rw_lock.patch is ported from InnoDB Plugin 1.0.3 To… group. For support, commercial and sponsorship inquiries contact Percona. innodb_rw_lock.patch
