Solution : https://service.sap.com/sap/support/notes/1152848 (SAP Service marketplace login required)
Summary :
Wait events in SQL Server are integral for understanding request execution blockages within database operations, serving as diagnostic tools to optimize performance. By monitoring different types of wait events, such as idle events or lock waits, DBAs can identify inefficiencies and determine where tuning is needed. Access to this data is available via dynamic management views like sys.dm_os_wait_stats and sys.dm_exec_requests, or through transaction code "DBACockpit" in SAP systems. The SAP Note outlines the relevance of various wait events and explains the methods to analyze them, including the use of report /SDF/RSMSSVSE for classifying and studying the impact of wait classes on response times. Additionally, the note provides guidance on interpreting wait times and signal wait times to better understand their role in overall database latency.
Key words :
lck_m_x lck_m_u lck_m_s lck_m_ii_x lck_m_is_s lck_m_is_u lck_m_bu lck_m_is lck_m_iu lck_m_ix lck_m_sch_m lck_m_sch_s lck_m_siu lck_m_six lck_m_uix lck_m_ii_nl lck_m_rs_s lck_m_rs_u lck_m_rx_s lck_m_rx_u lck_m_rx_x lck_m_rin_nl lck_m_rin_s lck_m_rin_u lck_m_rin_x meaning, async_network_io net_waitfor_packet sni_critical_section soap_read soap_write networkio meaning, largest part 'wait event tuning' offers guidance, pageiolatch_sh pageiolatch_ex pageiolatch_up pageiolatch_dt pageiolatch_kp meaning, pagelatch_sh pagelatch_up pagelatch_ex pagelatch_kp pagelatch_dt meaning, /9/4/d948f981-926e-40fa-a026-5bfcf076d9b9/performance_tuning_waits_queues, wait event resource wait time signal wait time optional, cxpacket exchange execsync pagesupp pss_child meaning, latch_sh latch_up latch_ex latch_dt latch_kp meaning, aspx async_io_completion impprov_iowait io_completion logmgr meaning
Related Notes :
| 1133183 | Sporadic long inserts into table observed in ST05/ST12 |
| 1085937 | Wait Event Analysis For SQL Server |
| 987961 | FAQ: SQL Server I/O performance |
| 879941 | Configuration Parameters for SQL Server 2005 |
| 806342 | FAQ: Analyzing exclusive database locks on SQL Server |
| 521750 | FAQ: SQL Server 2000 I/O performance |
| 327494 | Configuration Parameters for SQL Server 2000 |