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Options for tuning resource use
Limiting the number of cursors
Limiting the number of statements
Lowering a connection's priority
Prefetching cache pages
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If scrolling cursors are never used in your application, you should make this a
permanent
option. It will use less memory and make a big
PUBLIC
improvement in query performance.
The
MAX_CURSOR_COUNT
maximum number of cursors that a connection can use at once. The default is
50. Setting this option to 0 allows an unlimited number of cursors.
The
MAX_STATEMENT_COUNT
the maximum number of prepared statements that a connection can use at once.
When you set the
BACKGROUND_PRIORITY
current connection have minimal impact on the performance of other
connections. This option allows tasks for which responsiveness is critical to
coexist with other tasks for which performance is not as important.
The
option
SET
PREFETCH_BUFFER_LIMIT
pages available to Adaptive Server IQ for use in prefetching (the read ahead of
database pages). This option has a default value of 20, which can degrade
multi-user performance. Sybase recommends that you set this option to 0 for
multi-user applications. For more information, see the Adaptive Server IQ
Reference Manual.
option specifies a resource governor to limit the
option specifies a resource governor to limit
option to ON, requests on the
defines the number of cache
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