sql server responding slow

(OrdID, ordRow, Item, Qty) VALUES ('20170901', '01', 'g4385', 5) \ n'; strSQL = 'Insert INTO OrderRows (OrdID, OrdRow, Item, qty) VALUES ('20170101', '02', 'g4726', 1) \ n'; strSQL = 'commit TRANSACTION \ n '; StrSQL = 'set XACT_ABORT OFF \ n'; objDBC. execute (strSQL); where the SET XACT_ABORT OFF statement tells SQL Server that if an error occurs during the following transaction processing, the completed

, the second is to not destroy the index)3. Too much data (sub-database table)4. Server tuning and individual parameter settings (adjustment my.cnf)Second, when analyzing the reasons, we must find the starting point:1. First observe, turn on the slow query log, set the appropriate thresholds (for example, more than 3 seconds is slow

reverse DNS resolution in the configuration file by simply adding the following line to the MY.CNF [MYSQLD] paragraph:Skip-name-resolve (Windows is the same as Linux) Table Cache --View the number of open tables show global status like ' open%tables% ';--View cache's upper limit value show variables like ' Table_open_cache ';Open_tables: Is the number of tables currently open in the cache.Opened_tables: Is the number of open tables since MySQL started.When the Opened_tables value

Label:Written in the first About the start and configuration of slow SQL before I clean up the article: Http://www.cnblogs.com/hanxiaobei/p/5515624.html Prerequisite Preparation: tomcat7.x Mysql--perfteach Jmeter Test interface: 192.168.1.102:8081/perfteach/slowquery?cardno=1000009 Script writing: Single interface test JMeter is more convenient, so this article is tested with JMeter Environment Constructio

Label:Environment: Server-side SDE 10.0 Oracle 11.2, client plsql 11,oracle 11.2 For debugging convenience, the following test is to extract SQL to do on the Plsql Demand is known as the point coordinate of a polygon, to be in a line layer, do relational intersect spatial query, the original SQL is this Select LNO from hsline T where Sde.st_intersect

internal control of MySQL, a lot of data is not very prepared, now generally used to check the historical dataThe disadvantage of the second approach: because it is only run once a week, a lot of things can not find and alarmThe downside of the third approach: when the nodes are slowlog very much, top10 becomes meaningless, and often gives you the regular task statements that are sure to run. Reference is of little valueSo how do we solve and query these problems? For troubleshooting problem f

When the slow_query_log value is on (the default value is off, the default value is 10 s, and accurate to microseconds), the default value (when the log_output value is fifl) will record this slow query: the slow_query_log_file value is specified in the file.Mysql> select @ Global. log_output;+ --------------------- +| @ Global. log_output |+ --------------------- +| File |+ --------------------- +1 row in SET (0.00 Sec) Note that mysql5.1 supports st

Unlocked update NOLOCK unlocked unlocked unlocked unlocked HOLDLOCK shared share share update UPDLOCK error update update update TABLOCKX error unlocked Lock updates Other unlocked unlocked unlocked updates * Specifies that the NOLOCK prompt will cause the table specified for that hint to be read-only in Gianpene. 16, with Profiler to track the query, get the time required to find out the problem of SQL; optimizing indexes with the index optimizer 17

| | ' | ' | | Fcm_recv_wait_time | | ' | ' | | Fcm_send_wait_time from (SELECT * from TABLE (mon_get_pkg_cache_stmt (null, NULL, ' Script descriptionThis script is a script that crawls slow SQL and needs to be executed every 5 minutes on the database server. Each execution of the script fetches an SQL s

(Sp_spaceuse)3) Upgrading hardware4) According to the query criteria, index, optimize the index, optimize access mode, limit the data volume of the result set. Note that the fill factor is appropriate (preferably using the default value of 0). The index should be as small as possible, using a Lie Jian index with a small number of bytes (refer to the creation of the index), do not Jianjian a single index on a limited number of values such as the gender field5) Improve speed;6) Expand the memory

Label: 1. Using SQL Dynamic View As follows: Select Top B.text, A.total_worker_time,a.total_logical_reads,a.total_elapsed_time,execution_count from sys.dm_exec_query_stats a Cross as b Order by Total_worker_time/desc View the online Help document view: Sys.dm_exec_query_stats can get all the field meanings, mainly Total_worker_time: Total CPU consumption time Total_logical_reads: Number of logical Reads Total_elapsed_time:

,1) =1) then 1 else Executions end), NBSP;NBSP;NBSP;NBSP;NBSP;NBSP;NBSP;NBSP;NBSP;NBSP;NBSP;2) >5--100 0000 μs =1s ands.parsing_schema_name =user andto_char (S.LAST_LOAD_TIME, ' yyyy-mm-dd ') = to_char (SYSDATE, ' yyyy-mm-dd ' ) andnbSp s.command_typein (2,3,5,6,189) ORDERBY "Execution time ' S" "DESC; /* Command_type meaning in sql: 2:insert 3:select 6:update 7:delete 189:merge Details can be found V$sqlcommand view */V$sqlarea of

Why write through the linked server, the speed is very slow because when the link server is written, line-by-row write to the database, row by line INSERT, trigger trigger, and so on, write a few lines of data, triggered several triggers, inserted,deleted and other system tables each time only one row of data If the same serv