DBA

save the following scripts into one and run it during performance issue, you will have an overall view of the server wait events, cpu load and what sql is running. 1. to clear dm_os_wait_stats   DBCC SQLPERF('sys.dm_os_wait_stats',CLEAR) 2. use the following query to get the delta of 2 seconds of os wait statistics. select wait_type,waiting_tasks_count,wait_time_ms,max_wait_time_ms,signal_wait_time_ms into #originalwaitstatsnapshot from sys.dm_os_wait_stats  waitfor delay '00:00:02'  select wait_type,waiting_tasks_count,wait_time_ms,max_wait_time_ms,signal_wait_time_ms into #latestwaitstatsnapshot from sys.dm_os_wait_stats  select l.wait_type,(l.wait_time_ms-o.wait_time_ms) accum_wait_ms from #originalwaitstatsnapshot o inner join #latestwaitstatsnapshot l on o.wait_type=l.wait_type  where l.wait_time_ms > o.wait_time_ms order by accum_wait_ms desc 3. Query to find out which statement is running (stmt_end = -1), and cpu status (is_idle =0, r...

DECLARE @Handle binary(100) SELECT @Handle =0x020000002AA01D147A952286D9A2BE3ECA9B96FC9D588946 select * from ::fn_get_sql(@handle)

found this blog is helpful to get CPU and IO statistics on oracle database. http://shob-dbadmin.blogspot.ca/2012/12/how-to-find-total-io-of-database.html courtesy to  Shomil Bansal , below are hist writing, not mine. How to find total IO of the database instance Total IO of database instance is sum of the physical reads, physical writes and redo writes. There are several views to find these values. v$sysmetric  - Reports metric values for only the most current time sample 60 secs. v$sysmetric_summary  - Reports metric values for time sample of 1 hour. v$sysmetric_history  - Reports metric values every 60 sec from the time instance is up. Better way to analyse IO using this view to take deltas between two time periods. dba_hist_sysmetric_history  - All the above views are refreshed when the instance is restarted. This view, part of AWR, stores the historical stats. I have used this view for my report. Query: ====== set lines 350...

found this article. http://www.mssqltips.com/sql-server-tip-category/81/PowerShell/ http://www.mssqltips.com/sqlservertip/2911/using-powershell-to-access-event-logs-for-sql-server/?utm_source=dailynewsletter&utm_medium=email&utm_content=headline&utm_campaign=20130917 substract commands: about logs: Get-EventLog -list Get-EventLog -LogName "application" | Where-Object {$_.source -like "*SQL*"} | select-Object Index,entrytype, message Get-EventLog -LogName "application" -Message "*error*" -After "April 01, 2013 4:52:31 PM" | Where-Object {$_.source -like "*SQL*"} | format-list TimeGenerated, Source, Message Get-EventLog -LogName "system" -newest 20 | export-csv c:\tools\top_20_events.csv  Get-EventLog -LogName "system" | Where-Object {$_.source -like "*SQL*"} | select-Object Index,entrytype, message | out-file C:\tools\sql_server_logs.txt $begintime = Get-Date 10/31/2...

http://www.mssqltips.com/sqlservertip/2977/demonstrations-of-transaction-isolation-levels-in-sql-server/?utm_source=dailynewsletter&utm_medium=email&utm_content=headline&utm_campaign=20130826 Demonstrations of Transaction Isolation Levels in SQL Server By:  Derek Colley    |    Read Comments (5)    |   Related Tips:  More  >  Locking and Blocking Free SQL Server Learning: You Inherited a Database, Now What? Problem You are looking at ways of ensuring atomicity and consistency in your database by ensuring transactional integrity. You may want to avoid locks, or ensure problems such as lost updates or dirty reads cannot occur, or otherwise ensure the quality of your data. Transactional isolation is a narrow but somewhat complex subject that might be ideal for your needs. Solution This article will cover the five transaction isolation settings - READ UNCOMMITTED, READ COMMITTED (lock...

I have a request from user that he want to run a report from server automatically on third Monday every month, I use the following Unix shell script to take care of it. #RUNDATE=`cal |awk 'NR == 3 { print $2; }'` #if [ "$RUNDATE" == '' ]; then NUMBERFIELD=`cal |awk 'NR == 3 { print NF; }'` if [ $NUMBERFIELD -lt 6 ]; then         RUNDATE=`cal |awk 'NR == 6 { print $2; }'`         else RUNDATE=`cal |awk 'NR == 5 { print $2; }'` fi echo $RUNDATE TODAY=`date +%e` if [ $TODAY == $RUNDATE ]; then echo "Today `date +%Y%m%d` is run day!" else echo "Today `date +%Y%m%d` is NOT run day!" echo "run date should be at ${RUNDATE}th, which is the thrid Monday for each month." exit fi ... sqlplus -s / as sysdba <<- EOF         SET MARKUP HTML ON ENTMAP ON SPOOL ON PREFORMAT OFF         SET ECHO OFF TERM OFF VERIFY OFF FEEDBACK OFF TRIMS OFF PAGESIZE 999         set marku...

I have a database link created between oracle and sqlserver using oracle tg4odbc, the product is installed on windows server and run as service "OracleOraGtw11g_home1TNSListener", but sometime the service cannot started, the root cause of this problem is that the port number 1521 is used by an non-existent process. The first step is to use netstat -bano|find "1521" to get the process id, in my case it's 5844, which shows the connection is from my oracle server 10.8.0.169 H:\>netstat -bano|find "1521"   TCP    0.0.0.0:1521           0.0.0.0:0              LISTENING       5844   TCP    10.14.45.33:1521       10.8.0.169:42987       ESTABLISHED     5844 however the process id does not show in either task manager or process explorer. The next step is to run tcpview, which shows non-existent under process column, there are three rows, t...