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Excessive z-lock time with LOAD command?

There is a significant gap (~ 3.5 minutes) in the time our LOAD
command indicates that the BUILD phase is complete and the time we
have control returned to our script.

I ran the test below on a dedicated system with no other processes
running. Our tablespaces are on Veritas filesystems. Any insight/
suggestions welcome...

From the LOAD output:

SQL3515W The utility has finished the "LOAD" phase at time
"02/20/2008
13:31:55.301939 ".

SQL3500W The utility is beginning the "BUILD" phase at time
"02/20/2008
13:31:55.304641 ".

SQL3213I The indexing mode is "INCREMENTA L".

SQL3515W The utility has finished the "BUILD" phase at time
"02/20/2008
13:32:38.044731 ".
Number of rows read = 437645
Number of rows skipped = 0
Number of rows loaded = 437645
Number of rows rejected = 0
Number of rows deleted = 0
Number of rows committed = 437645

db2 =db2 (cont.) =DB20000I The SQL command completed
successfully.
db2 =>
Wed Feb 20 13:36:08 EST 2008
Feb 20 '08 #1
2 3053
On Feb 20, 12:46*pm, mike.lopi...@fm r.com wrote:
There is a significant gap (~ 3.5 minutes) in the time our LOAD
command indicates that the BUILD phase is complete and the time we
have control returned to our script.

I ran the test below on a dedicated system with no other processes
running. Our tablespaces are on Veritas filesystems. Any insight/
suggestions welcome...

From the LOAD output:

SQL3515W *The utility has finished the "LOAD" phase at time
"02/20/2008
13:31:55.301939 ".

SQL3500W *The utility is beginning the "BUILD" phase at time
"02/20/2008
13:31:55.304641 ".

SQL3213I *The indexing mode is "INCREMENTA L".

SQL3515W *The utility has finished the "BUILD" phase at time
"02/20/2008
13:32:38.044731 ".

Number of rows read * * * * = 437645
Number of rows skipped * * *= 0
Number of rows loaded * * * = 437645
Number of rows rejected * * = 0
Number of rows deleted * * *= 0
Number of rows committed * *= 437645

db2 =db2 (cont.) =DB20000I *The SQL command completed
successfully.
db2 =>
Wed Feb 20 13:36:08 EST 2008
Can you paste the load command ? Do you use temp tablespaces to build
indexes? That would mean more time to transfer the indexes from the
temp tablespaces to it's parent tablespace..
Feb 20 '08 #2
On Feb 20, 2:09*pm, Arun Srinivasan <arunro...@gmai l.comwrote:
On Feb 20, 12:46*pm, mike.lopi...@fm r.com wrote:


There is a significant gap (~ 3.5 minutes) in the time our LOAD
command indicates that the BUILD phase is complete and the time we
have control returned to our script.
I ran the test below on a dedicated system with no other processes
running. Our tablespaces are on Veritas filesystems. Any insight/
suggestions welcome...
From the LOAD output:
SQL3515W *The utility has finished the "LOAD" phase at time
"02/20/2008
13:31:55.301939 ".
SQL3500W *The utility is beginning the "BUILD" phase at time
"02/20/2008
13:31:55.304641 ".
SQL3213I *The indexing mode is "INCREMENTA L".
SQL3515W *The utility has finished the "BUILD" phase at time
"02/20/2008
13:32:38.044731 ".
Number of rows read * * * * = 437645
Number of rows skipped * * *= 0
Number of rows loaded * * * = 437645
Number of rows rejected * * = 0
Number of rows deleted * * *= 0
Number of rows committed * *= 437645
db2 =db2 (cont.) =DB20000I *The SQL command completed
successfully.
db2 =>
Wed Feb 20 13:36:08 EST 2008

Can you paste the load command ? Do you use temp tablespaces to build
indexes? That would mean more time to transfer the indexes from the
temp tablespaces to it's parent tablespace..- Hide quoted text -

- Show quoted text -
Here is the abbreviated command (removed some columns):

LOAD FROM File.del of del modified by coldel| tempfiles path '/
filesystem1/archive/dbconfig/TEMPFILES'
INSERT INTO Daily1 (
date,
time,
..... upd_d
) NONRECOVERABLE cpu_parallelism 6

Running DB2 V8 FixPak #12.
Feb 20 '08 #3

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