SELECT top 20 ad.companyname,comid,position,ad.referenceid,worklocation, convert(varchar(10),ad.postDate,120) as postDate1,workyear,degreedescription FROM jobcn_query.dbo.COMPANYAD_query ad where referenceID in(‘JCNAD00329667′,’JCNAD132168′,’JCNAD00337748′,’JCNAD00338345′,’JCNAD003331...
SELECT top 20 ad.companyname,comid,position,ad.referenceid,worklocation, convert(varchar(10),ad.postDate,120) as postDate1,workyear,degreedescription FROM jobcn_query.dbo.COMPANYAD_query ad where referenceID in('JCNAD00329667','JCNAD132168','JCNAD00337748','JCNAD00338345','JCNAD00333138','...
Buffer cache hit ratio这计数器的值,是不具备参考意义的,即便是观察到Buffer cache hit ratio命中率很高,也不一定代表服务器上没有内存瓶颈, 如果Buffer cache hit ratio命中率很低,极有可能说明存在内存瓶颈,此时还要借助于其他计数器来判断是否存在内存瓶颈,单纯一个Buffer cache hit ratio无法判断内存瓶颈。 后记...
SELECT top 20 ad.companyname,comid,position,ad.referenceid,worklocation, convert(varchar(10),ad.postDate,120) as postDate1,workyear,degreedescription FROM jobcn_query.dbo.COMPANYAD_query ad where referenceID in(‘JCNAD00329667’,‘JCNAD132168’,‘JCNAD00337748’,‘JCNAD00338345’,‘JCNAD003331...
Cache Hit Ratio:SQL PlansSQLServer:Plan Cache< 70%表示低計劃重複使用率。 Buffer Cache Hit RatioSQLServer:Buffer Manager< 97%可能造成記憶體壓力。 當CPU 使用率很高時,SQL Server 延遲寫入器 (在 SQL Server 2000 中的名稱) 或資源監視器 (在 SQL Server 2005 中的名稱) 是另一個需要監控部分。透過稱...
Each time a query is submitted to the server, the procedure cache is reviewed to attempt to match a query plan with a request. If one is not found then SQL Server will create a new plan for it, which is a potentially costly operation....
## Database name to query. Default is master. database = "master" ## by default, support TLS 1.2 and above. ## set to true if server side uses TLS 1.0 or TLS 1.1 allow_tls10 = false ## connection timeout default: 30s connect_timeout = "30s" ...
## Database name to query. Default is master. database = "master" ## by default, support TLS 1.2 and above. ## set to true if server side uses TLS 1.0 or TLS 1.1 allow_tls10 = false ## connection timeout default: 30s connect_timeout = "30s" ...
1.Configuration: Check the memory configuration of SQL Server. If SQL Server has been configured with insufficient memory, it will incur more I/O overhead. You can examine the following counters to identify memory pressure: ·Buffer Cache hit ratio ...
Plan Cache:Cache Hit Ratio % 每个SQL 有一个执行计划,执行计划的命中率 缓冲区缓存命中率 Buffer cache hit ratio % 数据缓存(内存)命中率 锁 锁请求次数 Lock Requests/sec 次/秒 平均每秒锁请求的次数 每秒闩锁等待数量 Latch Waits/sec 次/秒 每秒闩锁等待数量 平均锁等待延迟 Average wait time Ms 每个...