Informix User Forum 2005
Moving Forward With Informix
Unix DB2 Navigation for an
Informix DBA
Kate Tomchik
Lead DBA / The Home Depot
Atlanta, Georgia
December 8-9, 2005
DB2 Navigation for an Informix
DBA
Informix Users Cheat
Sheet
for Unix DB2 Support
First rule of DBA support
When user calls with a problem verify
the database is up.
If not restart it.
If it is, get permission to bounce it.
DB2 Instances running
> db2ilist
#-- not always set up
cpainp95:/opt/hd/db/db2/instance/adfi11> db2ilist
adis32
adis33
adfi11
> Ps -ef | grep db2sysc | grep -v grep
cpainp95: /home/lkt01> ps -ef | grep db2sysc | grep -v grep
adfi11 876768 917730 0 Jul 27
- 0:09 db2sysc 0
adis33 1056790 1392730 0 Jul 27
- 0:09 db2sysc 0
adis32 1933360 2170886 0 Aug 12
- 0:01 db2sysc 0
Typical DB2 processes





















cpainp95: /home/lkt01> ps -fu adfi11 | grep db2
adfi11 647364 876768 0 Jul 27
- 0:36 db2gds 0
adfi11 786632 876768 0 Jul 27
- 0:04 db2ipccm 0
adfi11 811222 647364 0 Aug 13
- 0:04 db2dlock (DAD014FI) 0
adfi11 876768 917730 0 Jul 27
- 0:09 db2sysc 0
adfi11 901346 876768 0 Jul 27
- 0:00 db2syslog 0
adfi11 934120 647364 0 Jul 27
- 0:00 db2srvlst 0
adfi11 983280 876768 0 Jul 27
- 0:00 db2tcpcm 0
adfi11 999672 876768 0 Jul 27
- 0:00 db2resync 0
adfi11 1016056 876768 0 Jul 27
- 0:00 db2spmrsy 0
adfi11 1040638 647364 0 Jul 27
- 0:00 db2spmlw 0
adfi11 1261798 647364 0 Aug 13
- 0:06 db2loggw (DAD014FI) 0
adfi11 1327176 786632 0 Jul 27
- 2:42 db2agent (instance) 0
adfi11 1491052 647364 0 Jul 27
- 0:02 db2cart 0
adfi11 1556610 647364 0 Jul 27
- 1:19 db2agent (DAD014FI) 0
adfi11 1564804 647364 0 Jul 27
- 0:03 db2agent (idle) 0
adfi11 1753190 647364 0 Aug 13
- 0:00 db2pfchr 0
adfi11 1884196 647364 0 Aug 13
- 0:00 db2event
(DB2DETAILDEADLOCK) 0
adfi11 2015258 647364 0 Aug 13
- 0:00 db2pfchr 0
adfi11 2023660 647364 0 Aug 13
- 0:00 db2loggr (DAD014FI) 0
adfi11 2433208 647364 0 Aug 13
- 0:00 db2pclnr 0
Start an Instance
>oninit
# --- in Informix
> db2start #--- run as id of instance
cpaiad28: /opt/hd/db/db2/> su – remm60
cpaiad28: /opt/hd/db/db2/instance/remm60> db2start
08-16-2005 13:28:17
0 0 SQL1063N DB2START
processing was successful.
SQL1063N DB2START processing was successful.
Start an Instance (con’t)
cpaiad28:
UID
remm60
remm60
remm60
remm60
remm60
remm60
remm60
remm60
remm60
remm60
remm60
/opt/hd/db/db2/instance/remm60> ps -fu remm60
PID PPID C STIME TTY TIME CMD
1335306 7127088 0 13:28:16
- 0:00 db2ipccm 0
1687694 7192802 0 13:18:55 pts/0 0:00 -ksh
1695826 4866232 0 13:28:17
- 0:00 db2srvlst 0
2252828 7127088 0 13:28:17
- 0:00 db2spmrm 0
3645576 4866232 0 13:28:17
- 0:00 db2resyn 0
4530428 1687694 1 13:28:24 pts/0 0:00 ps -fu remm60
4603946 7127088 0 13:28:16
- 0:00 db2tcpcm 0
4628634 7127088 0 13:28:16
- 0:00 db2tcpcm 0
4866232 7127088 0 13:28:16
- 0:00 db2gds 0
6955014 4866232 0 13:28:17
- 0:00 db2spmlw 0
7127088 4997122 0 13:28:16
- 0:00 db2sysc 0
Stop an Instance
> onmode -ky
# --- in informix
> db2stop
# --- run as userid of instance
cpaiad28: /opt/hd/db/db2/instance/remm60
> db2stop
08-16-2005 13:22:17
0 0 SQL1064N DB2STOP processing was
successful.
SQL1064N DB2STOP processing was successful.
> ps -fu remm60
UID
PID
PPID
C STIME
TTY
TIME CMD
remm60 1687694 7192802 0 13:18:55 pts/0 0:00 -ksh
remm60 4538434 1687694 1 13:27:02 pts/0 0:00 ps –fu remm60
Hard Kill an Instance (bad way)
Informix:
> ps -ef | grep oninit # --- find #1
owned process
> kill -9 {PID}
DB2:
> ps -ef | grep db2sysc {0} # --- 0
process for multiprocessor engine
> kill -9 {PID}
Db2_kill (less corruption risk)
> db2_kill # db2 utility
cpaiad28: /opt/hd/db/db2/instance/remm60>
db2_kill
cpaiad28: ipclean: Removing DB2 engine and
client's IPC resources for remm60.
cpaiad28: db2nkill [] completed ok
2nd Rule of DBA Support
If one user is stopping a 100 users from
getting to their tables,
Kill the Offending Process.
>db2 list applications show detail
# identify bad process and get the Appl.
Handle and Coordinator PID/Thread.
db2 force appliction {AH}
# similar to onmode –z {PID} in Informix

3rd Rule – Check the log files
>{db2path} / db2dump / db2diag.log
cpainp95:/opt/hd/db/db2/instance/adfi11/sqllib/db2dump> ls -l
total 10352
-rw-rw-rw- 1 adfi11 sysadm
4821 Jul 27 07:46
adfi11.nfy
-rw-rw-rw- 1 adfi11 sysadm
46803 Jul 27 12:04
db2diag.log
-rw-r----- 1 adfi11 sysadm
5242044 Jul 27 07:36
db2eventlog.000.crash
db2diag.log – main log of database activity
adfi11.nfy file contains notifications.
db2eventlog.000 files are similar to /tmp/af files since they are
created during database errors but they are not readable.
Send to IBM when opening a PMR.
Adis32.nfy (v8 file)
ADM7514W Database manager has stopped.
^^
2004-04-02-18.57.12.883227 Instance:adis32
PID:573572(db2star2) TID:1 Appid:none
base sys utilities startdbm Probe:911
Node:000
ADM7513W Database manager has started.
^^
2005-11-02-13.12.15.570194 Instance:adis32 Node:000
PID:2457760(db2agent (CQMASTR2) 0) TID:1
Appid:*LOCAL.adis32.0800F2181219
database monitor sqm.evmgr::log_ev_err Probe:2 Database:DAD036IS
ADM2004E The Event Monitor "DB2DETAILDEADLOCK" was not activated
because there
was not enough storage space in the database monitor heap. To remedy this
problem, increase the MON_HEAP_SZ DBM configuration parameter and restart
the
instance.
Db2diag.log
ADM7513W Database manager has started.
2005-08-02-15.01.16.014367 Instance:adis32 Node:000
PID:2318574(db2agent (DAD033IS) 0) TID:1 Appid:*LOCAL.adis32.0003D2190114
database utilities sqlubcka Probe:0 Database:DAD033IS
Starting a full database backup.
2005-08-02-15.01.53.519377 Instance:adis32 Node:000
PID:2318574(db2agent (DAD033IS) 0) TID:1 Appid:*LOCAL.adis32.0003D2190114
database utilities sqlubcka Probe:128 Database:DAD033IS
Estimated size of backup in bytes:
0x0FFFFFFFFFFF5008 : 0x0000000008489000
.....H..
2005-08-02-15.01.53.524680 Instance:adis32 Node:000
PID:2318574(db2agent (DAD033IS) 0) TID:1 Appid:*LOCAL.adis32.0003D2190114
database utilities sqlubcka Probe:128 Database:DAD033IS
Actual size of backup in bytes:
0x0FFFFFFFFFFF5010 : 0x0000000008405000
.....@P.
2005-08-02-15.01.53.529787 Instance:adis32 Node:000
PID:2318574(db2agent (DAD033IS) 0) TID:1 Appid:*LOCAL.adis32.0003D2190114
database utilities sqlubcka Probe:130 Database:DAD033IS
Backup Complete.
When all else fails - Call Support
IBM support calls create PMRs {Problem
Management Record}
You will want already have the following:
1) Hardware type and operating system
version >uname –a #ex AIX 5.1
2) DB2 version
3) Configuration file, environment variables
4) Ability to send the log files via ftp to
IBM.
Version of DB2
> su - adfi11 # enter password
> db2level
cpainp95:/opt/hd/db/db2/instance/adfi11> db2level
DB21085I Instance "adfi11" uses "32" bits and DB2 code
release SQL08013" with level identifier "02040106".
Informational tokens are "DB2 v8.1.1.24", "s030728",
"U488481", and FixPak "3".
Product is installed at "/usr/opt/db2_08_01".
DB2 Environment Variables
cpainp95:> env | grep DB2
DB2INSTANCE=adfi11
cpainp95:> db2set -all
[i] DB2COMM=tcpip
[i] DB2AUTOSTART=YES
[g]
DB2_EEE_LICENSE_POLICY=1125904201
875456
[g] DB2ADMINSERVER=db2as
View the Configuration File
Informix
>view $INFORMIXDIR/etc/onconfig
>view $INFORMIXDIR/etc/sqlhosts
DB2
> db2 get dbm cfg | more
#--- you scroll through the file. Updates cannot be
made directly to the file, you use a utility
> db2 update dbm cfg using
{parameter} {value}
Current path
similar to >echo $INFORMIXDIR
but each instance has a different
location
> db2path
cpainp95:/opt/hd/db/db2/instance/adfi11> db2path
/opt/hd/db/db2/instance/adfi11/sqllib
Advanced Beginning Functions
Recommendation: Take a class if you
really need to work in UDB DB2.
Warning: The beginning class shows
everything through a GUI interface.
The following shows the basics using
command line functions.
Databases for an Instance
Must run as the instance owner:
> db2 "list db directory"
System Database Directory
Number of entries in the directory = 1
Database 1 entry:
Database alias
Database name
Local database directory
Database release level
Comment
Directory entry type
Catalog node number
= DPR060TA
= DPR060TA
= /opt/hd/db/db2/dbdir/dpr060ta
= 9.00
=
= Indirect
=0
Database Connection State
> db2 "get connection state"
Database Connection State
Connection state
= Connectable and Unconnected
Connection mode
=
Local database alias =
Database name
=
Connect to a Database


Informix > dbaccess {database}
{command.sql}
Gives error if the instance has not
been started
> db2 connect to dpr060ta
Database Connection Information
Database server
= DB2/6000 7.2.6
SQL authorization ID = REMM60
Local database alias = DPR060TA
Instance creation
You must have root access to create
 You must have user ids created for each
instance, where as in Informix you could
always just use Informix
 You may also create a fenced user id for the
instance. This ID does not have system
administration (sysadm) privileges
> db2icrt -u {instance fenced id} {instance}

Some parameters in the DBM
Database Manager Configuration
Node type = Enterprise Server Edition with local and remote clients
Diagnostic error capture level
(DIAGLEVEL) = 3
Notify Level
(NOTIFYLEVEL) = 2
Diagnostic data directory path
(DIAGPATH) =
/opt/hd/db/db2/instance/adis32/sqllib/db2dump
Default database path
(DFTDBPATH) =
/opt/hd/db/db2/instance/adis32
Max number of existing agents
(MAXAGENTS) = 400
TCP/IP Service name
(SVCENAME) = adis32
No. of int. communication buffers(4KB) (FCM_NUM_BUFFERS) = 4096
Make a Backup
Db2 “backup db {database} {online}
{incremental} use {adsm}
Multipartition:
Db2_all “<<+0<db2 backup db {database}
{online} {incremental} use {adsm}
Example
Db2 “ backup db dpr060mm online use
adsm”
Check quality of the backup
Checksum:
Db2adutl verify full taken at
{datetime} db {database}
Example:
Db2adutl verify full taken at
20040512171343 db dpr010sa
Get list of past backups
> db2 list history backup all for {database}
Op Obj Timestamp+Sequence Type Dev Earliest Log Current Log Backup ID
-- --- ------------------ ---- --- ------------ ------------ -------------B D 20050927020010001 N A S0000509.LOG S0000510.LOG
---------------------------------------------------------------------------Contains 7 tablespace(s):
00001 SYSCATSPACE
00002 WCSDATA4K
00003 WCSINDEX4K
00004 WCSDATA8K
00005 WCSINDEX8K
00006 WCSDATA16K
00007 WCSINDEX16K
---------------------------------------------------------------------------Comment: DB2 BACKUP DPR010SA ONLINE
Start Time: 20050927020010
End Time: 20050927020043
---------------------------------------------------------------------------00013 Location: adsm/libtsm.a
Restore Database command
Db2 “restore database {database}
use {tsm} taken at {date/time}
NOTE: This is the start time from the
history output.
Example Restore
Get last good backup date/time:
>db2 list history backup all for dpr010sa
Check attached users:
>db2 list applications
Force users off:
 db2 force applications all
Run restore as nohup:
>nohup db2 “restore database dpr010sa use tsm
taken 20040512171343”
Verify completed:
>db2 “connect to dpr010sa”
Run SQL Against a table


db2 connect to {database}
Db2 “select * from {table-name}
Example:
>db2 “select substr(tabname,1,18) as
table_name from syscat.tables
where type=‘T’ order by 1”
# gets system tables
External SQL file for run
Create a file that contains each SQL command
separated by a “;”
cpaita28: /usr/ra/bin> cat count.sql
> select count(*) from syscat.tables where
type='T';
> select count(*) from syscat.indexes;
Run an sql file:
>db2 –tvf {sql file} –z {output file}
Example:
>db2 –tvf count.sql –z count.out
Some Important System Tables
Prefix with owner/schema syscat
Tables
Indexes
Dbauth
Tabauth
Dependancies
Tablespaces
tbspaceauth
Data space issues

db2 “list tablespaces”
Tablespaces for Current Database
Tablespace ID
Name
Type
Contents
State
Detailed explanation:
Normal
=0
= SYSCATSPACE
= System managed space
= Any data
= 0x0000
Tablespace ID
Name
Type
Contents
State
Detailed explanation:
Normal
=1
= TEMPSPACE1
= System managed space
= Temporary data
= 0x0000
Tablespace ID
Name
Type
Contents
State
Detailed explanation:
Normal
=2
= USERSPACE1
= System managed space
= Any data
= 0x0000
Data space issues
User created tablespace:
Tablespace ID
Name
Type
Contents
State
Detailed explanation:
Normal
=3
= PR001TAAQB
= Database managed space
= Any data
= 0x0000
System managed space: automatic expansions up to the max
size of the file system.
Database managed space: dba allocates additional space
Data space – Detailed information
> db2 “list tablespaces show detail” | more
Tablespace ID
Name
Type
Contents
State
Detailed explanation:
Normal
Total pages
Useable pages
Used pages
Free pages
High water mark (pages)
Page size (bytes)
Extent size (pages)
Prefetch size (pages)
Number of containers
=3
= PR001TAAQB
= Database managed space
= Any data
= 0x0000
= 100000
= 99968
= 99968
=0
= 99968
= 4096
= 32
= 32
=1
##Includes used pages information and page size for additional allocations.
Add disk space
Expand the containers for a tablespace.
>alter tablespace {tbspacename} extend
(all containers {expand amount});
#Every container is expanded the same
amount and data is blanced across all
containers. Expand amount is in pages.
Can take many minutes.
Get Stored Procedure SQL
Db2 “export to {filename} of del select text
from syscat.procedures where
procname=‘{ProcName}’”
Example
>db2 “export to filename.sql of del select
text from syscat.procedures where
procname=‘ADJUSTINV’”
# creates procedure code in filename.sql
Informix User Forum 2005
Moving Forward With Informix
Unix DB2 Navigation for an
Informix DBA
Kate Tomchik
Kate_Tomchik@HomeDepot.com
kate@iiug.org
Atlanta, Georgia
December 8-9, 2005