What is query result cache?
A result cache is an area of memory, either in the Shared Global Area (SGA) or client application memory, that stores the results of a database query or query block for reuse. The cached rows are shared across SQL statements and sessions unless they become stale.
Should you cache search results?
When you expire a result in the cache, you fall back to the search backend to recompute the results for the query, and then you store those results in the cache. Bottom line, caching is amazingly effective in search.
Why is cache faster than database?
A cache’s primary purpose is to increase data retrieval performance by reducing the need to access the underlying slower storage layer. Trading off capacity for speed, a cache typically stores a subset of data transiently, in contrast to databases whose data is usually complete and durable.
How do you handle exceptions in bulk insert?
Bulk DML: Building Blocks
- A collection variable to hold the data.
- The FORALL construct which iterates through values in the collection variable.
- The SAVE EXCEPTIONS clause which tracks the exceptions being raised during bulk DML.
How do I view a cache?
View cache data
- Click the Application tab to open the Application panel.
- Expand the Cache Storage section to view available caches.
- Click a cache to view its contents.
- Click a resource to view its HTTP headers in the section below the table.
- Click Preview to view a resource’s content.
What happens when the result of a query is not cached?
If the result is not cached, then the database executes the query, returns the result as output, and stores the result in the result cache. When users execute queries and functions repeatedly, the database retrieves rows from the cache, decreasing response time. Cached results become invalid when data in dependent database objects is modified.
Is there fix for Informix server 11.70.xc9?
Informix Server provides periodic fixes for release 11.70. The following list is the most recent report of fixes for customer-reported defects in Version 11.70.xC9. This report combines both Windows- and UNIX-specific defect fixes, and is more current than the defect information included in the product release.
What’s the default expiration time for the result cache?
You can set this parameter at the system or session level. Specifies the expiration time (in minutes) for a result in the server result cache that depends on remote database objects. The default value is 0, which specifies that results using remote objects will not be cached.
Why does Informix server not clean up XA transactions?
POOL WHEN SPL PROCEDURE EXECUTED VIA INSERT TRIGGER ON A VIEW THE ONMODE COMMAND CANNOT CLEAN UP XA TRANSACTIONS WHEN IFX_XA_UNIQUEXID_IN_DATABASE IS ENABLED. ASSERT FAILURE AND CRASH ON PROMOTION OF HDR SECONDARY TO PRIMARY WITH HEURISTICALLY COMPLETED XA TRANSACTION.