Hello,
I'm looking for some hints, which can help me to analyse the disk acitvity for a single "Left Outer Join" SQL statement. Unfortunately, the business is not able to enter an additional Where - clause.
Our database (version: 7.9.08.14 / OLTP) is running on a virtual Windows 2008 R2 Server (ESXi 5.1.0). All datavolumes (50 pieces) are on a single LUN.
If I use the "x_cons <DB> show active 1 25", I get this reponse from, where T128 is my ID. During the whole runtime of the statement, there is no high cpu (Task Manager) or high disk activity (Resource Monitor of Windows). If I copy a file (3,5 GB) on the LUN, the performance is OK.
SERVERDB: xxx
ID UKT Win TASK APPL Current Timeout/ Region Wait
tid type pid state Priority cnt try item
T128 11 0x13DC User 1240* IO Wait (R) 0 27 39077695(s)
ID UKT Win TASK APPL Current Timeout/ Region Wait
tid type pid state Priority cnt try item
T54 9 0x1A60 User 6884* IO Wait (R) 0 15 121292233(s)
T128 11 0x13DC User 1240* IO Wait (R) 0 24 39077820(s)
ID UKT Win TASK APPL Current Timeout/ Region Wait
tid type pid state Priority cnt try item
T35 8 0x1770 User 1812* IO Wait (R) 0 26 32578072(s)
T54 9 0x1A60 User 6884* IO Wait (R) 0 47 121292754(s)
T128 11 0x13DC User 1240* IO Wait (R) 0 9 39078040(s)
ID UKT Win TASK APPL Current Timeout/ Region Wait
tid type pid state Priority cnt try item
T54 9 0x1A60 User 6884* IO Wait (R) 0 20 121292947(s)
T128 11 0x13DC User 1240* IO Wait (R) 0 26 39078296(s)
ID UKT Win TASK APPL Current Timeout/ Region Wait
tid type pid state Priority cnt try item
T128 11 0x13DC User 1240* IO Wait (R) 0 29 39078437(s)
ID UKT Win TASK APPL Current Timeout/ Region Wait
tid type pid state Priority cnt try item
T128 11 0x13DC User 1240* IO Wait (R) 0 13 39078563(s)
ID UKT Win TASK APPL Current Timeout/ Region Wait
tid type pid state Priority cnt try item
T128 11 0x13DC User 1240* IO Wait (R) 0 4 39078667(s)
ID UKT Win TASK APPL Current Timeout/ Region Wait
tid type pid state Priority cnt try item
T128 11 0x13DC User 1240* IO Wait (R) 0 20 39078759(s)
ID UKT Win TASK APPL Current Timeout/ Region Wait
tid type pid state Priority cnt try item
T128 11 0x13DC User 1240* IO Wait (R) 0 8 39078856(s)
ID UKT Win TASK APPL Current Timeout/ Region Wait
tid type pid state Priority cnt try item
T128 11 0x13DC User 1240* IO Wait (R) 0 3 39079019(s)
ID UKT Win TASK APPL Current Timeout/ Region Wait
tid type pid state Priority cnt try item
T128 11 0x13DC User 1240* IO Wait (R) 0 37 39079176(s)
ID UKT Win TASK APPL Current Timeout/ Region Wait
tid type pid state Priority cnt try item
T128 11 0x13DC User 1240* IO Wait (R) 0 11 39079282(s)
I know there are many components, but maybe with some hints I'm able to exclude a one or more component(s). I already check the good scripts from http://maxdb.sap.com/traning, but unfortunately without success.
Thank you!
best regards
Lukas Meusburger