SQL Server RESOURCE_SEMAPHORE ?????
???????????? ???????[ 2013/2/1 10:12:53 ] ????????
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?????????SQLServer??????械煤??????????????些??椋�??????????????????????????????????????????????????????????????????????????????????????????????渭???????????????????????Resource_semaphore????????????????????????????????
?????????????????械??????????????Resource_semaphore?????????????????????????些????IO??????????些???????????????????????????????????????????IO?????
????Resource_semaphore?????
??????????????奴??????????Resource_semaphore???????SQLServer??????????????????????????????????????????????????????????????????屑??????SQLServer????????????????????????????????????????????????????妫╮equired memory?????????妫╝dditional memory??
??????????????????????hash?????????????妫�???谓???“????”????????????????????????????????妾�??????????????????????????????????????妾�????????????妫�???????????????娴�?????小?
???????????????????????????????????????妾�???????????????????????????????????????貌???????????????????????????*???卸????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????妫╮equested memory??????SQLServer?????????????Resource Semaphore?????????????????????????????????????械????????妫�????????????Resource_Semaphore???????sysprocesses???????sys.dm_exec_request DMV?胁????
??????Resource_semaphore????????渭??????????????????胁?????????校?????????校??????????????????????????????校?Resource Semaphore?????未?????????????妫�??????????????????????????????妾�???????????????妫�????????娓�???????Resource Semaphore??????????????鍎�????小???????????????????????????胁?????Resource_Semaphore?????????????????????????????????????
???????Resource_Semaphore?????
????????1??
??????????????????Resource_Semaphore??????????
SELECT *
FROM sys.SYSPROCESSES
WHERE lastwaittype = 'RESOURCE_SEMAPHORE'
ORDER BY lastwaittype
?????????????????????????????????薪????
????????2??
?????????1?械?????????????????????????ResourceSemaphore ??????????????????????????????????????????????????未???????????????????????DMV???????校??????resource_semaphore_id?0????????????些???1??小??????????小?????小??5M???????????????????????????????????妾�?????grantee_count??waiter_count??grantee_count???????????????????????????waiter_count????????械????????????????????
SELECT *
FROM sys.dm_exec_query_resource_semaphores
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