一般情况下,特定的SP在15-20分钟内完成.从SQL中可以看到,BCP out命令的等待类型是PAGEIOLATCH_SH。SP的等待类型为PAGEIOLATCH_SH和PAGEIOLATCH_EX。当它们并行运行时,SP进入了SUSPENDED状态,就像执行sp_who2时看到<e 浏览0提问于2019-07-19得票数 1 1回答 隐藏WaitType PAGEIOLATCH_SH的原因是什么? 、、、 ...
SQL Server 2005: Wait Type - PAGEIOLATCH_SH PAGEIOLATCH_SH: Occurs when a task is waiting on a latch for a buffer that is in an I/O request. The latch request is in Shared mode. PAGEIOLATCH_SH waits is very brief as they are only held on a page during IO operations. You can also...
One of the most common wait type seen on SQL Server and definitely one that causes a lot of troubles to less experienced database administrators is the PAGEIOLATCH_SH wait type. This is one of those wait types that clearly indicates one thing, but which background and potential causes are m...
Investigate disk latency Increase the maximum memory allocation Indexing, look for high disk I/O queries Enable data page compression if CPU usage is not suffering Additional research Handling excessive SQL Server PAGEIOLATCH_SH wait types Knee-Jerk Wait Statistics : PAGEIOLATCH_SH SQL Authority: PAGEI...
See the PAGEIOLATCH_SH wait type for more details, but bear in mind that these waits can also be for page writes, not just for page reads. Known occurrences in SQL Server (list number matches call stack list): Updating the database boot page (page 9 in file 1) at the end of a lo...
See the PAGEIOLATCH_SH wait type for more details. Known occurrences in SQL Server (list number matches call stack list): No known occurrences. Abbreviated call stacks (list number matches known occurrences list): No known occurrences. Resources Online Waits Course Scripts and Posts Latches White...
order by wait_type 下面是查询出来的等待信息: PageIOLatch_SH 总等待时间是(7166603.0-15891)/1000.0/60.0=119.17分钟,平均耗时是(7166603.0-15891)/297813.0=24.01毫秒,最大等待时间是3159秒。 PageIOLatch_EX 总等待时间是(3002776.0-5727)/1000.0/60.0=49.95分钟, 平均耗时是(3002776.0-5727)/317143.0=9.45毫秒,最...
wait_type avg_resource_wait_ms PAGEIOLATCH_SH 2.95 PAGEIOLATCH_EX 10.21 SOS_SCHEDULER_YIELD 0.01 WRITELOG 3.03 These stats are since the last restart, so it' tough to tell if there is a real problem here. If the application is experiencing slowness, you'll want to look at these wait stat...
Also, you say you checked the plan, I mean, did you look at the plan when it's running slow to compare it to when it's running fast. If you're hitting a bad parameter sniffing issue that leads to a different execution plan for a short period of time, you could see intermittent pe...
a page associated with the BUF is currently being read from or written to disk. This is how the engine knows that if your thread is waiting on a latch, that it is waiting on an “IO Latch”. The wait_type will therefore look something like PAGEIOLATCH_SH as opposed to PAGELATCH_SH. ...