11-25-2013
Ok,
It all depends on the type of system, large pages are intended for high performance computing applications which are memory intensive (such as oracle). Enabling large pages help and this is due to ....
"The large page performance improvements are attributable to reduced translation lookaside buffer (TLB) misses due to the TLB being able to map a larger virtual memory range. Large pages also improve memory prefetching by eliminating the need to restart prefetch operations on 4KB boundaries"
Now you need to know, whether your system is that memory intensive. Remember changing vmo parameter has it's affect if changed for no real reason and on guessing.
As asked by the admin in the forum, you need to know what is going slow and where.
CIO, you can do it, basically it will omit the layer of file system caching, thus saving you some memory and cpu time. But again it depends on the environment.
I looked at the graph no 2, you said real memory is 24 but the graph says otherwise (16 gigs).
Look at the error report is it complaining on memory?
The graph should reduce the green area (cache) once you enable CIO. And you know what to do with redo logs file system.
I hope this helps!
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LEARN ABOUT DEBIAN
dbix::searchbuilder::handle::oracle
DBIx::SearchBuilder::Handle::Oracle(3pm) User Contributed Perl Documentation DBIx::SearchBuilder::Handle::Oracle(3pm)
NAME
DBIx::SearchBuilder::Handle::Oracle - An oracle specific Handle object
SYNOPSIS
DESCRIPTION
This module provides a subclass of DBIx::SearchBuilder::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.
BuildDSN
Customized version of "BuildDSN" in DBIx::SearchBuilder::Handle method.
Takes additional argument SID. Database argument used unless SID provided. Two forms of DSN are generated depending on whether Host
defined or not:
dbi:Oracle:sid=<SID>;host=...[;port=...]
dbi:Oracle:<SID>
Read details in documentation for DBD::Oracle module.
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.
InsertFromSelect
Customization of "InsertFromSelect" in DBIx::SearchBuilder::Handle.
Unlike other DBs Oracle needs:
o id generated from sequences for every new record.
o query wrapping in parens.
NOTE that on Oracle there is a limitation on the query. Every column in the result should have unique name or alias, for example the
following query would generate "ORA-00918: column ambiguously defined" error:
SELECT g.id, u.id FROM ...
Solve with aliases:
SELECT g.id AS group_id, u.id AS user_id FROM ...
KnowsBLOBs
Returns 1 if the current database supports inserts of BLOBs automatically. Returns undef if the current database must be informed of BLOBs
for inserts.
BLOBParams FIELD_NAME FIELD_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).
ApplyLimits STATEMENTREF ROWS_PER_PAGE FIRST_ROW
takes an SQL SELECT statement and massages it to return ROWS_PER_PAGE starting with FIRST_ROW;
DistinctQuery STATEMENTREF
takes an incomplete SQL SELECT statement and massages it to return a DISTINCT result set.
BinarySafeBLOBs
Return undef, as Oracle doesn't support binary-safe CLOBS
DatabaseVersion
Returns value of ORA_OCI constant, see "Constants" in DBI.
SimpleDateTimeFunctions
Returns hash reference with specific date time functions of this database for "DateTimeFunction" in DBIx::SearchBuilder::Handle.
ConvertTimezoneFunction
Custom implementation of "ConvertTimezoneFunction" in DBIx::SearchBuilder::Handle.
Use the following query to get list of timezones:
SELECT tzname FROM v$timezone_names;
Read Oracle's docs about timezone files:
http://download.oracle.com/docs/cd/B14117_01/server.101/b10749/ch4datetime.htm#i1006667
AUTHOR
Jesse Vincent, jesse@fsck.com
SEE ALSO
perl(1), DBIx::SearchBuilder
perl v5.14.2 2011-09-21 DBIx::SearchBuilder::Handle::Oracle(3pm)