Error while database export in package SAPDODS_33 (Unicode conversion)

Question

Hello,
I am performing Unicode conversion on an upgraded BI 7.0 system. This is running on AIX/DB2.
When I take database export for conversion, one package fails (SAPDODS_33) with error "The file system is full". In fact, df -k doesn't show that any file system is full.
I am taking the export to the following location: /db2/BWS/sapdata/EXPORT_DIR
There are 3 system-managed temporary tablespaces: PSAPTEMP, PSATEMP16 & SYSTOOLSTMPSPACE which were residing in /db2/BWS/saptemp1/NODE0000. This was getting full during the export. Now these temp.tablespaces have been relocated to a new file system of size 15GB.
But still the package SAPDODS_33 doesn't get exported. Could you please let me know how to solve this issue?
Thanks a lot!
Sundar.
=====================================================================================
SAPDODS_33.log
(DB) INFO: connected to DB
(rscpsumg) Please look also into "SAPDODS_33012.xml".
(rscpMC) Warn: env I18N_NAMETAB_TIMESTAMPS = IGNORE
(rscpMC) Warn: UMGCONTAINER has 1 problems.
(rscpMC) Warn: Global fallback code page = 1160
(rscpMC) Warn: Common character set is  not  7-bit-ASCII
(rscpMC) Warn: Collision resolution method is 'fine'
(rscpMC) Warn: R3trans code pages = Normal
(rscpMC) Warn: EXPORT TO ... code pages = Normal
(rscpMC) Warn: Source is 'MDMP'
(rscpMC) Warn: I18N_NAMETAB_NORM_ALLOW = 0
(rscpMC) Warn: I18N_NAMETAB_NORM_LOG   = 0
(rscpMC) Warn: I18N_NAMETAB_ALT_ALLOW  = 0
(rscpMC) Warn: I18N_NAMETAB_ALT_LOG    = 0
(rscpMC) Warn: I18N_NAMETAB_OLD_ALLOW  = 0
(rscpMC) Warn: I18N_NAMETAB_OLD_LOG    = 0
(GSI) INFO: dbname   = "BWS
(GSI) INFO: vname    = "DB6                             "
(GSI) INFO: hostname = "UNKNOWN
(GSI) INFO: sysname  = "AIX"
(GSI) INFO: nodename = "itmlartdev01x"
(GSI) INFO: release  = "3"
(GSI) INFO: version  = "5"
(GSI) INFO: machine  = "002417CA4C00"
(GSI) INFO: instno   = "0020169337"
(EXP) ERROR: DbSlExeRead failed
  rc = 99, table "/BIC/B0000786000"
  (SQL error -968)
  error message returned by DbSl:
SQL0968C  The file system is full.  SQLSTATE=57011
(DB) INFO: disconnected from DB
/usr/sap/BWS/SYS/exe/run/R3load: job finished with 1 error(s)
/usr/sap/BWS/SYS/exe/run/R3load: END OF LOG: 20071211053119
p/sapinst/sapinst_instdir/NW04S/LM/COPY/DB6/EXP/CENTRAL/AS-ABAP/EXP #

Answer 1

Hi Sundar,
if the problem is due to a high temp space usage. The root cause is typically the
sort during export. If the table is large, the sort spills to temp.
You can avoid the sort by doing an unsorted export or tweak the DB2 optimizer to use the primary key to do the sort.
Before DB2 9, you can reduce the OVERHEAD tablespace parameter to zero. Return this value to its previous value after the successful export. This is a indirect hint to the optimizer that random IOs are cheap. This might not help.
With DB2 9, this should not happen, because the  DB2_OPT_MAX_TEMP_SIZE=10240 registry variable is set under DB2_WORKLOAD=SAP which limits the temp space usage to 10GB if possible. You can reduce this parameter further if necessary. Another problem could be that the optimizer has chosen the wrong temp space. The optimizer choses the temp space with the largest amount of pages (not size).
Regards, Jens