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Operating Systems AIX Asynchronous I/O on AIX and DB performance Post 302515385 by zaxxon on Wednesday 20th of April 2011 03:37:41 AM
Old 04-20-2011
maxservers is the hard limit for the maximum number of aioservers being started, that handle aio requests. They are calculated by the number of logical CPUs * maxservers. They are the workers that grab their work out of the pot with the label "maxreqs".

maxreqs defines how much work may reside in this pot. The single working tasks can be waiting to be handled or already be taken care of by a aioserver which is the asynchronism.
If there is more tasks in there, that are waiting to be taken care of than aioservers, it will just take some time until they are next. If there is far less aioservers than tasks (requests) that are ready to run, then it will be maybe a noticeable delay in processing.

pSeries and AIX Information Center

Last edited by zaxxon; 04-20-2011 at 08:35 AM.. Reason: syntax, rephrasing
 

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SQL::ReservedWords::DB2(3pm)				User Contributed Perl Documentation			      SQL::ReservedWords::DB2(3pm)

NAME
SQL::ReservedWords::DB2 - Reserved SQL words by DB2 SYNOPSIS
if ( SQL::ReservedWords::DB2->is_reserved( $word ) ) { print "$word is a reserved DB2 word!"; } DESCRIPTION
Determine if words are reserved by DB2. METHODS
is_reserved( $word ) Returns a boolean indicating if $word is reserved by either DB2 5, 6, 7 or 8. is_reserved_by_db2v5( $word ) Returns a boolean indicating if $word is reserved by DB2 5. is_reserved_by_db2v6( $word ) Returns a boolean indicating if $word is reserved by DB2 6. is_reserved_by_db2v7( $word ) Returns a boolean indicating if $word is reserved by DB2 7. is_reserved_by_db2v8( $word ) Returns a boolean indicating if $word is reserved by DB2 8. reserved_by( $word ) Returns a list with DB2 versions that reserves $word. words Returns a list with all reserved words. EXPORTS
Nothing by default. Following subroutines can be exported: is_reserved is_reserved_by_db2v5 is_reserved_by_db2v6 is_reserved_by_db2v7 is_reserved_by_db2v8 reserved_by words SEE ALSO
SQL::ReservedWords <http://www-306.ibm.com/software/data/db2/udb/> AUTHOR
Christian Hansen "chansen@cpan.org" COPYRIGHT
This program is free software, you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.8.8 2008-03-28 SQL::ReservedWords::DB2(3pm)
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