Wait

Author: a | 2025-04-25

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wait, waited, waits, waiting- WordWeb dictionary definition

14.17.2 Monitoring InnoDB Mutex Waits Using Performance Schema A mutex is a synchronization mechanism used in the code to enforce that only one thread at a given time can have access to a common resource. When two or more threads executing in the server need to access the same resource, the threads compete against each other. The first thread to obtain a lock on the mutex causes the other threads to wait until the lock is released. For InnoDB mutexes that are instrumented, mutex waits can be monitored using Performance Schema. Wait event data collected in Performance Schema tables can help identify mutexes with the most waits or the greatest total wait time, for example. The following example demonstrates how to enable InnoDB mutex wait instruments, how to enable associated consumers, and how to query wait event data. To view available InnoDB mutex wait instruments, query the Performance Schema setup_instruments table, as shown below. All InnoDB mutex wait instruments are disabled by default. mysql> SELECT * FROM performance_schema.setup_instruments WHERE NAME LIKE '%wait/synch/mutex/innodb%';+-------------------------------------------------------+---------+-------+| NAME | ENABLED | TIMED |+-------------------------------------------------------+---------+-------+| wait/synch/mutex/innodb/commit_cond_mutex | NO | NO || wait/synch/mutex/innodb/innobase_share_mutex | NO | NO || wait/synch/mutex/innodb/autoinc_mutex | NO | NO || wait/synch/mutex/innodb/buf_pool_mutex | NO | NO || wait/synch/mutex/innodb/buf_pool_zip_mutex | NO | NO || wait/synch/mutex/innodb/cache_last_read_mutex | NO | NO || wait/synch/mutex/innodb/dict_foreign_err_mutex | NO | NO || wait/synch/mutex/innodb/dict_sys_mutex | NO | NO || wait/synch/mutex/innodb/recalc_pool_mutex | NO | NO || wait/synch/mutex/innodb/file_format_max_mutex | NO | NO || wait/synch/mutex/innodb/fil_system_mutex | NO | NO || wait/synch/mutex/innodb/flush_list_mutex | NO | NO || wait/synch/mutex/innodb/fts_bg_threads_mutex | NO | NO || wait/synch/mutex/innodb/fts_delete_mutex | NO | NO || wait/synch/mutex/innodb/fts_optimize_mutex | NO | NO || wait/synch/mutex/innodb/fts_doc_id_mutex | NO | NO || wait/synch/mutex/innodb/log_flush_order_mutex | NO | NO || wait/synch/mutex/innodb/hash_table_mutex | NO | NO || wait/synch/mutex/innodb/ibuf_bitmap_mutex | NO | NO || wait/synch/mutex/innodb/ibuf_mutex | NO | NO || wait/synch/mutex/innodb/ibuf_pessimistic_insert_mutex | NO | NO || wait/synch/mutex/innodb/log_sys_mutex | NO | NO || wait/synch/mutex/innodb/page_zip_stat_per_index_mutex | NO | NO || wait/synch/mutex/innodb/purge_sys_pq_mutex | NO | NO || wait/synch/mutex/innodb/recv_sys_mutex | NO | NO || wait/synch/mutex/innodb/recv_writer_mutex | NO | NO || wait/synch/mutex/innodb/redo_rseg_mutex | NO | NO || wait/synch/mutex/innodb/noredo_rseg_mutex | NO | NO || wait/synch/mutex/innodb/rw_lock_list_mutex | NO | NO || wait/synch/mutex/innodb/rw_lock_mutex | NO | NO || wait/synch/mutex/innodb/srv_dict_tmpfile_mutex | NO | NO || wait/synch/mutex/innodb/srv_innodb_monitor_mutex | NO | NO || wait/synch/mutex/innodb/srv_misc_tmpfile_mutex | NO | NO || wait/synch/mutex/innodb/srv_monitor_file_mutex | NO | NO || wait/synch/mutex/innodb/buf_dblwr_mutex | NO | NO || wait/synch/mutex/innodb/trx_undo_mutex | NO | NO || wait/synch/mutex/innodb/trx_pool_mutex | NO | NO || wait/synch/mutex/innodb/trx_pool_manager_mutex | NO | NO || wait/synch/mutex/innodb/srv_sys_mutex | NO | NO || wait/synch/mutex/innodb/lock_mutex | NO | NO || wait/synch/mutex/innodb/lock_wait_mutex | NO | NO || wait/synch/mutex/innodb/trx_mutex | NO | NO || wait/synch/mutex/innodb/srv_threads_mutex | NO | NO || wait/synch/mutex/innodb/rtr_active_mutex | NO | NO || wait/synch/mutex/innodb/rtr_match_mutex | NO | NO || wait/synch/mutex/innodb/rtr_path_mutex | NO | NO || wait/synch/mutex/innodb/rtr_ssn_mutex | NO | NO || wait/synch/mutex/innodb/trx_sys_mutex | NO | NO || wait/synch/mutex/innodb/zip_pad_mutex | NO | NO |+-------------------------------------------------------+---------+-------+49 rows in set (0.02 sec) Some InnoDB mutex instances are created at server startup and are only instrumented if the associated instrument is also enabled at server startup.

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Is presented in descending order, by the number of summarized wait events (COUNT_STAR). You can adjust the ORDER BY clause to order the data by total wait time. mysql> SELECT EVENT_NAME, COUNT_STAR, SUM_TIMER_WAIT/1000000000 SUM_TIMER_WAIT_MS FROM performance_schema.events_waits_summary_global_by_event_name WHERE SUM_TIMER_WAIT > 0 AND EVENT_NAME LIKE 'wait/synch/mutex/innodb/%' ORDER BY COUNT_STAR DESC;+--------------------------------------------------+------------+-------------------+| EVENT_NAME | COUNT_STAR | SUM_TIMER_WAIT_MS |+--------------------------------------------------+------------+-------------------+| wait/synch/mutex/innodb/os_mutex | 78831 | 10.3283 || wait/synch/mutex/innodb/log_sys_mutex | 41488 | 6510.3233 || wait/synch/mutex/innodb/trx_sys_mutex | 29770 | 1107.9687 || wait/synch/mutex/innodb/lock_mutex | 24212 | 104.0724 || wait/synch/mutex/innodb/trx_mutex | 22756 | 1.9421 || wait/synch/mutex/innodb/rseg_mutex | 20333 | 3.6220 || wait/synch/mutex/innodb/dict_sys_mutex | 13422 | 2.2284 || wait/synch/mutex/innodb/mutex_list_mutex | 12694 | 344.1164 || wait/synch/mutex/innodb/fil_system_mutex | 9208 | 0.9542 || wait/synch/mutex/innodb/rw_lock_list_mutex | 8304 | 0.1794 || wait/synch/mutex/innodb/trx_undo_mutex | 6190 | 0.6801 || wait/synch/mutex/innodb/buf_pool_mutex | 2869 | 29.4623 || wait/synch/mutex/innodb/innobase_share_mutex | 2005 | 0.1349 || wait/synch/mutex/innodb/flush_list_mutex | 1274 | 0.1300 || wait/synch/mutex/innodb/file_format_max_mutex | 1016 | 0.0469 || wait/synch/mutex/innodb/purge_sys_bh_mutex | 1004 | 0.0326 || wait/synch/mutex/innodb/buf_dblwr_mutex | 640 | 0.0437 || wait/synch/mutex/innodb/log_flush_order_mutex | 437 | 0.0510 || wait/synch/mutex/innodb/recv_sys_mutex | 394 | 0.0202 || wait/synch/mutex/innodb/srv_sys_mutex | 169 | 0.5259 || wait/synch/mutex/innodb/lock_wait_mutex | 154 | 0.1172 || wait/synch/mutex/innodb/ibuf_mutex | 9 | 0.0027 || wait/synch/mutex/innodb/srv_innodb_monitor_mutex | 2 | 0.0009 || wait/synch/mutex/innodb/ut_list_mutex | 1 | 0.0001 || wait/synch/mutex/innodb/recv_writer_mutex | 1 | 0.0005 |+--------------------------------------------------+------------+-------------------+25 rows in set (0.01 sec)Note The preceding result set includes wait event data produced during the startup process. To exclude this data, you can truncate the events_waits_summary_global_by_event_name table immediately after startup and before running your workload. However, the truncate operation itself may produce a negligible amount wait event data. mysql> TRUNCATE performance_schema.events_waits_summary_global_by_event_name;

Tentkotta - Wait. Wait. Wait!!!! STOP SCROLLING.

WAIT, verb intransitive [The sense is to stop, or to continue.]1. To stay or rest in expectation; to stop or remain stationary, till the arrival of some person or event. Thus we say, I went to the place of meeting, and there waited an hour for the moderator or chairman. I will go to the hotel, and there wait till you come. We will wait for the mail.2. To stay proceedings, or suspend any business, in expectation of some person, event, or the arrival of some hour. The court was obliged to wait for a witness.3. To rest in expectation and patience.All the days of my appointed time will I wait till my change come. Job 14:14.4. To stay; not to depart.Haste, my dear father, tis no time to wait 5. To stay; to continue by reason of hindrance.6. To lie in ambush, as an enemy.Such ambush waited to intercept thy way.To wait on or upon, to attend, as a servant; to perform menial services for; as, to wait on a gentleman; to wait on the table.To wait on, 1. To attend; to go to see; to visit on business or for ceremony. Tell the gentleman I will wait on him at ten oclock.2. To pay servile or submissive attendance.3. To follow, as a consequence; as the ruin that waits on such a supine temper. [Instead of this, we use await.]4. To look watchfully.It is a point of cunning to wait on him with whom you speak, with your eye. [Unusual.]5. To attend to; to perform.Aaron and his sons shall wait on their priests office. Numbers 3:10, 8. Romans 12:7.6. To be ready to serve; to obey. Psalms 25:3. Proverbs 20:22.To wait at, to attend in service; to perform service at. 1 Corinthians 9:13.To wait for, to watch, as an enemy. Job 15:22.WAIT, verb transitive 1. To stay for; to rest or remain stationary in expectation of the arrival of.Awd with these words, in camps they still abide, and wait with longing eyes their promisd guide. [Elliptical for wait for.]2. To attend; to accompany with submission or respect.He chose a thousand horse, the flowr of all his warlike troops, to wait the funeral. [This use is not justifiable, but by poetical license.]3. To attend as a consequence of something.Such doom waits luxury--[Not in use. In this sense we use attend or attend on.]WAIT, noun Ambush. As a noun, this word. Wait Meme Soundboard; No no Wait Wait! Wait. That's illegal. WAIT WAIT WAIT WAIT WAIT WAIT (don pollo) always has been. No, Wait a minute, I'm Crippled, No. DJ Khaled Says

Tentkotta - Wait. Wait. Wait!!!! STOP SCROLLING

| 686322 || 87 | wait/synch/mutex/mysys/THR_LOCK_malloc | 320535 || 88 | wait/synch/mutex/mysys/THR_LOCK_malloc | 339390 || 89 | wait/synch/mutex/mysys/THR_LOCK_malloc | 377100 || 90 | wait/synch/mutex/sql/LOCK_plugin | 614673 || 91 | wait/synch/mutex/sql/LOCK_open | 659925 || 92 | wait/synch/mutex/sql/THD::LOCK_thd_data | 494001 || 93 | wait/synch/mutex/mysys/THR_LOCK_malloc | 222489 || 94 | wait/synch/mutex/mysys/THR_LOCK_malloc | 214947 || 95 | wait/synch/mutex/mysys/LOCK_alarm | 312993 |+----------+-----------------------------------------+------------+ As new events are added to a history table, older events are discarded if the table is full. Summary tables provide aggregated information for all events over time. The tables in this group summarize event data in different ways. To see which instruments have been executed the most times or have taken the most wait time, sort the events_waits_summary_global_by_event_name table on the COUNT_STAR or SUM_TIMER_WAIT column, which correspond to a COUNT(*) or SUM(TIMER_WAIT) value, respectively, calculated over all events: mysql> SELECT EVENT_NAME, COUNT_STAR FROM performance_schema.events_waits_summary_global_by_event_name ORDER BY COUNT_STAR DESC LIMIT 10;+---------------------------------------------------+------------+| EVENT_NAME | COUNT_STAR |+---------------------------------------------------+------------+| wait/synch/mutex/mysys/THR_LOCK_malloc | 6419 || wait/io/file/sql/FRM | 452 || wait/synch/mutex/sql/LOCK_plugin | 337 || wait/synch/mutex/mysys/THR_LOCK_open | 187 || wait/synch/mutex/mysys/LOCK_alarm | 147 || wait/synch/mutex/sql/THD::LOCK_thd_data | 115 || wait/io/file/myisam/kfile | 102 || wait/synch/mutex/sql/LOCK_global_system_variables | 89 || wait/synch/mutex/mysys/THR_LOCK::mutex | 89 || wait/synch/mutex/sql/LOCK_open | 88 |+---------------------------------------------------+------------+mysql> SELECT EVENT_NAME, SUM_TIMER_WAIT FROM performance_schema.events_waits_summary_global_by_event_name ORDER BY SUM_TIMER_WAIT DESC LIMIT 10;+----------------------------------------+----------------+| EVENT_NAME | SUM_TIMER_WAIT |+----------------------------------------+----------------+| wait/io/file/sql/MYSQL_LOG | 1599816582 || wait/synch/mutex/mysys/THR_LOCK_malloc | 1530083250 || wait/io/file/sql/binlog_index | 1385291934 || wait/io/file/sql/FRM | 1292823243 || wait/io/file/myisam/kfile | 411193611 || wait/io/file/myisam/dfile | 322401645 || wait/synch/mutex/mysys/LOCK_alarm | 145126935 || wait/io/file/sql/casetest | 104324715 || wait/synch/mutex/sql/LOCK_plugin | 86027823 || wait/io/file/sql/pid | 72591750 |+----------------------------------------+----------------+ These results show that the THR_LOCK_malloc mutex is “hot,” both in terms of how often it is used and amount of time that threads wait attempting to acquire it.Note The THR_LOCK_malloc mutex is used only in debug builds. In production builds it is not hot because it is nonexistent. Instance tables document what

Wait at or wait on or wait in ? - English Language Learners

We can click on it by using the "chain" function. 1.2.2. Now that we have the image we want to click on, we can use the "chain" function to click on it chain( dict(click="demo/edge_toolbar.jpg"), dict(click="demo/google_create_account", wait=1), dict(click="demo/personal_use", wait=1), debug=True ) 1.3. All mouse actions: * click * rightclick * leftclick * doubleclick * tripleclick * scrollup * scrolldown * scrollleft * scrollrightYou can also connect multiple keyboard actions together by using the "chain" function.2.1. Write text - This doesn't work well with non-english character. For this you can use the "pastetext" function. chain( dict(click="demo/notepad.jpg"), dict(write="Hello World!"), debug=True ) 2.2. Paste text - This works well with non-english characters chain( dict(click="demo/notepad.jpg"), dict(pastetext="Straße"), debug=True )2.3. Key combinations chain( dict(click="demo/notepad.jpg", wait=1), dict(write="Hello World!", wait=1), dict(keys2="ctrl+a", wait=1), dict(keys2="ctrl+x", wait=1), dict(keys2="alt+f4", wait=1), # close notepad debug=True ) 2.4. All key actions: * write * pastetext * keys * keys2 - best option overall for key combinations * keys3 * keys4 * copy * pasteWait actions:3.1. Wait until an image appears on the screenThis can used when you are waiting for a window to finish loading completely and you don't know exactly how long that would take. chain( dict(click="demo/notepad.jpg"), dict(waituntil="demo/notepad_opened.jpg", wait=1), dict(write="Hello World!", wait=1), debug=True )3.2. Wait while an image is on the screenApp (window) actions:4.1. Open an app chain( dict(open_app="notepad++.exe", wait=1), dict(waituntil="demo/notepad_opened.jpg", wait=1), dict(write="Hello World!", wait=1), debug=True )4.2. Close an app chain( dict(open_app="notepad++.exe", wait=1), dict(write="Hello World!", wait=1), dict(close="Notepad", wait=1), debug=True )4.3. Minimize an app chain( dict(open_app="notepad++.exe", wait=1), dict(write="Hello World!", wait=1), dict(minimize="Notepad", wait=1), debug=True )4.4. Maximize an app chain( dict(open_app="notepad++.exe", wait=1), dict(write="Hello World!", wait=1), dict(maximize="Notepad", wait=1), debug=True )4.5. Restore an app chain( dict(open_app="notepad++.exe", wait=1), dict(write="Hello World!", wait=1), dict(minimize="Notepad", wait=1), dict(restore="Notepad", wait=1), debug=True )4.6. All app actions: * open_app * close * startfile * focus * minimize * maximize * restore * msoffice_replace * copy_from * copy_from_toImage

Hey, wait, wait, wait, wait. Disguise your voice. - Workaholics.

Log to write the transaction commit log record to disk. High average wait times on this wait type indicate that the disk is writing the log slowly and this slows down every transaction. Very frequent waits on this wait type are indicative of doing many small transaction and having to block frequently to wait for COMMIT (remember that all data writes require a transaction and one is implicitly created for each statement if no BEGIN TRANSACTION is explicitly used).IO_COMPLETIONThis wait type occurs for tasks that are waiting for something else that ordinary data IO. Eg. loading an assembly DLL, reading and writing TEMPDB sort files, some special DBCC data reading operations.ASYNC_IO_COMPLETIONThis wait type is mostly associated with backup, restore, database and database file operations.If your wait time analysis finds that IO and disk are important wait types then your should focus on analyzing disk activity.Memory related wait typesRESOURCE_SEMAPHOREThis wait type indicate queries that are waiting for a memory grant. See Understanding SQL Server memory grant. OLTP type workload queries should not require memory grants,, if you see this wait type on an OLTP system then you need to revisit your application design. OLAP workloads often are in need of (sometimes large) memory grants and large wait times on this wait type usually point toward RAM increase upgrades.SOS_VIRTUALMEMORY_LOWAre you still on 32 bit systems? Move on!Network related wait typesASYNC_NETWORK_IOThis wait type indicate that the SQL Server has result sets to send to the application but the application odes not process them. This may indicate a slow network connection. But more often the problem is with the application code, it is either blocking while processing the result set or is requesting a huge result set.CPU, Contention and Concurrency related wait typesLCK_*Locks. All wait types that start with LCK indicate a task suspended. Wait Meme Soundboard; No no Wait Wait! Wait. That's illegal. WAIT WAIT WAIT WAIT WAIT WAIT (don pollo) always has been. No, Wait a minute, I'm Crippled, No. DJ Khaled Says