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Operating Systems AIX IBM AIX Internal HDD vs SAN HDD and Oracle Post 302883652 by bakunin on Wednesday 15th of January 2014 12:49:37 PM
Old 01-15-2014
Quote:
Originally Posted by filosophizer
Yes, both database size are exactly same, infact it is a clone of the production environment, the min max paging space and other parameters are also same.... everything is same. DATA, DATABASE, Parameters, OS,
only difference
ORADB = Production Environment runs on P4 and Oracle is on SAN = report take 25 minutes
CloneDB = Clone Environment runs on P5 and Oracle is on internal Disks = report takes 1 hour and 15 minutes
This way it sounds more logical, because SAN disks are (in most cases) much faster than physical disks. They have usually a lot more IOPS and more throughput bandwidth, because a lot of different reasons: stripesets, caching controllers, buses with higher bandwidth, ....

Your systems seem not to have the same amount of memory at all:

Code:
root@oradb:/>vmstat -v
              4194304 memory pages
              [...]
root@clodb:/>vmstat -v
              2097152 memory pages
              [...]

Further this looks dubious:
Code:
root@oradb:/>vmstat -v
                [...]
                80406 filesystem I/Os blocked with no fsbuf
                [...]

whereas:
Code:
root@clodb:/>vmstat -v
                 [...]
                 2740 filesystem I/Os blocked with no fsbuf
                 [...]

Not the value in itself is problematic, but the huge difference. Monitor the value closely over time, if it increases heavily you have found a potential bottleneck. If it stays at this level it is perhaps an artefact of some temporary memory shortness.

Finally, the tuning parameters seem to be different (compare "maxperm" and "minperm" in the different outputs, probably others are different too). You should run "vmo -a" (and the other tuning utilities, "schedo", "ioo", "no") on both machines to investigate other differences. What good values for maxperm and minperm would be is hard to suggest because it depends heavily on the (detailed) OS version which we do not know.

Another supposition (which would have to be proven by facts) of mine is that the faster processor is not needed in the special kind of report you run and therefore contributes nothing to some faster execution, whereas the disks contribute heavily.

I hope this helps.

bakunin
 

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Jifty::DBI::Handle::Oracle(3pm) 			User Contributed Perl Documentation			   Jifty::DBI::Handle::Oracle(3pm)

NAME
Jifty::DBI::Handle::Oracle - An oracle specific Handle object SYNOPSIS
DESCRIPTION
This module provides a subclass of Jifty::DBI::Handle that compensates for some of the idiosyncrasies of Oracle. METHODS
connect PARAMHASH: Driver, Database, Host, User, Password Takes a paramhash and connects to your DBI datasource. database_version Returns value of ORA_OCI constant, see "Constants" in DBD::Oracle. insert Takes a table name as the first argument and assumes that the rest of the arguments are an array of key-value pairs to be inserted. build_dsn PARAMHASH Takes a bunch of parameters: Required: Driver, Database or Host/SID, Optional: Port and RequireSSL Builds a dsn suitable for an Oracle DBI connection blob_params column_NAME column_type Returns a hash ref for the bind_param call to identify BLOB types used by the current database for a particular column type. The current Oracle implementation only supports ORA_CLOB types(112). apply_limits STATEMENTREF ROWS_PER_PAGE FIRST_ROW takes an SQL SELECT statement and massages it to return ROWS_PER_PAGE starting with FIRST_ROW; distinct_query STATEMENTREF takes an incomplete SQL SELECT statement and massages it to return a DISTINCT result set. AUTHOR
Jesse Vincent, jesse@fsck.com SEE ALSO
Jifty::DBI, Jifty::DBI::Handle, DBD::Oracle perl v5.14.2 2011-04-26 Jifty::DBI::Handle::Oracle(3pm)
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