1. #.1 SQL*Net Kyle Hailey http://oraclemonitor.com http//ashmasters.com/ Kyle.hailey@embarcadero.com

2. #.2 Copyright 2006 Kyle Hailey NetworkRedo Lib Cache Buffer Cache IO Locks Network

3. #.3 Copyright 2006 Kyle Hailey SQL*Net Waits Session Shadow Log Buffer Buffer Cache Log Buffer Buffer Cache SGA Library Cache Host Machine SQL*PlusOCISQL*Forms Java Application etc Client Network

4. #.4 Copyright 2006 Kyle Hailey SQL*Net Waits P1 and P2 Idle (or not?)  SQL*Net message from client Packing and Network:  SQL*Net message to client  SQL*Net more data to client  SQL*Net more data from client Error  SQL*Net break/reset to client Dblink equivalents  SQL*Net message to dblink  SQL*Net more data to dblink  SQL*Net more data from dblink  SQL*Net break/reset to dblink For Network Timings Use Ping Tnsping Network sniffers

5. #.5 SQL*Net message from client  Idle Event  Waiting for work from Client  Includes network transmission times for messages coming from shadow  Indicative of Client “think time” or “processing time” Session Shadow “idle” waiting for work from client Client “idle” “idle” or “working” “working” or waiting “waiting” ??? orasrp.ru

6. #.6 Copyright 2006 Kyle Hailey SQL*Net message to client  Time it takes to pack a message to be sent to the client  Doesn’t include network timing Session Shadow Waiting for MessagePacking http://blog.tanelpoder.com/2008/02/10/sqlnet-message-to-client-vs-sqlnet-more-data-to-client Client Waiting

7. #.7 Copyright 2006 Kyle Hailey SQL*Net more data to client  Client sends information that spans SDU packets  Time it takes to pack  Might include network timing - unclear Session Shadow Client Waiting for MessagePacking Waiting

8. #.8 Copyright 2006 Kyle Hailey SQL*Net more data from client  Client is sending data to shadow that spans packets  Shadow waits for next packet  Could indicate  network latency?  Problem with the client tool Session Shadow Waiting Client Working

9. #.9 Copyright 2006 Kyle Hailey SQL*Net more data from client  “OEM-lite”  Written in TCL/TK  Only  Overview  SQL Text Application Server Crashed

10. #.10 Copyright 2006 Kyle Hailey SQL*Net more data from dblink  Shadow at db link is sending data to client that spans packets  Sends first packet then waits for shadow to respond, so it can send more Session Shadow dblink Shadow “Client”

11. #.11 Copyright 2006 Kyle Hailey SDU: More Data  SDU : Session Data Unit Message size Set in sqlnet.ora client_187.trc:[12-JAN-2008 11:01:38:209] nsconneg: vsn=313, gbl=0xa01, sdu=2048, tdu=32767 trace_level_client=16trace_directory_client=/tmptrace_file_client=client.trc trace_unique_client = true trace_level_server=16trace_directory_server=/tmptrace_file_server=server.trc TDU – Transmission Data Unit – see note 44694.1 The TDU parameter has been deprecated in the Oracle Net v8.0 and beyond and is ignored. It is only mentioned here for backward compatibility.

12. #.12 Copyright 2006 Kyle Hailey SDU 32K V10G = (DESCRIPTION = (SDU=32768) (SDU=32768) (ADDRESS = (PROTOCOL = TCP)(HOST = fuji)(PORT = 1522)) (ADDRESS = (PROTOCOL = TCP)(HOST = fuji)(PORT = 1522)) (CONNECT_DATA = (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = v10g) (SERVER = DEDICATED) (SERVICE_NAME = v10g) ) ) ) ) SID_LIST_LISTENER = (SID_LIST = (SID_LIST = (SID_DESC = (SID_DESC = (SDU=32768) (SDU=32768) (SID_NAME = v10g) (SID_NAME = v10g) (ORACLE_HOME = /export/home/oracle10) (ORACLE_HOME = /export/home/oracle10) )) )) listener.ora tnsnames.ora client_3582.trc:[12-JAN-2008 11:37:39:237] nsconneg: vsn=313, gbl=0xa01, sdu=32768, tdu=32767

13. #.13 Copyright 2006 Kyle Hailey SQL*Net break/reset to client  Error in sql statement  Control C  Usually highlights and error in application Session Shadow Waiting Error Client

14. #.14 Copyright 2006 Kyle Hailey Example PARSING IN CURSOR #2 len=25 dep=0 uid=0 oct=2 lid=0 tim=5009300581224 hv=9816834 09 ad='8e6a7c10' INSERT INTO T1 VALUES (1) END OF STMT PARSE #2:c=0,e=2770,p=0,cr=2,cu=0,mis=1,r=0,dep=0,og=1,tim=5009300581220 BINDS #2: EXEC #2:c=0,e=128,p=0,cr=0,cu=0,mis=0,r=0,dep=0,og=1,tim=5009300581418 ERROR #2:err=1722 tim=512952379 WAIT #2: nam='SQL*Net break/reset to client' ela= 31 driver id=1650815232 break? =1 p3=0 obj#=-1 tim=5009300581549 WAIT #2: nam='SQL*Net break/reset to client' ela= 92 driver id=1650815232 break? =0 p3=0 obj#=-1 tim=5009300581662 CREATE TABLE T1 (C1 NUMBER); ALTER TABLE T1 ADD (CONSTRAINT T1_CHECK1 CHECK (C1 IN ('J','N'))); (CONSTRAINT T1_CHECK1 CHECK (C1 IN ('J','N'))); ALTER SESSION SET EVENTS '10046 TRACE NAME CONTEXT FOREVER, LEVEL 12'; '10046 TRACE NAME CONTEXT FOREVER, LEVEL 12'; INSERT INTO T1 VALUES (1);

15. #.15 Copyright 2006 Kyle Hailey SQL*Net break/reset to dblink  Error in sql statement  Control C  Usually highlights and error in application Session Shadow Waiting dblink Shadow error

16. #.16 Copyright 2006 Kyle Hailey Summary  Network/Client/Tool issues  More data from client  More data from dblink  Try SDU, RECV_BUF_SIZE and SEND_BUF_SIZE  SQL*Net more data from client  SQL*Net more data to client  SQL*Net more data from dblink  Application Error  SQL*Net break/reset to client  SQL*Net break/reset to dblink For Network Timings Use Ping Tnsping Network sniffers