Oracle Database Exadata Cloud Machine - Version N/A and later Oracle Database Cloud Exadata Service - Version N/A and later Information in this document applies to any platform. Symptoms 'gc blocks lost' increases after 12c Upgrade, we can see: 1. Statistic increases constantly: SELECT A.INS...
SGA_MAX_SIZE Parameter type Big integer Syntax SGA_MAX_SIZE = integer [K | M | G] Default value Initial size of SGA at startup, dependent on the sizes of different pools in the SGA, such as buffer cache, shared pool, large pool, and so on. Parameter class Static Range of va...
In a multi-user environment, or in an environment where the user accesses a lot of data, increase the size of the cache. You configure its size with the derby.storage.pageCacheSize property. For more information about how to set this property and how to estimate memory use, see the "...
Basic Table Compression • Introduced in Oracle Database 9i Release 2 – Compression during bulk load operations (Direct Load, CTAS) – Data modified using conventional DML not compressed • Improved performance for queries accessing large amounts of data – Fewer I/Os – Buffer Cache ...
When the HTTP header size is reached, the Oracle HTTP Server 10g rejects the request, thus preventing a buffer overrun. This example abnormally large request is rejected with an HTTP 400 error followed by a 401 error: X.X.X.X--[date/time] ...
Buffer Cache efficiency • Data is compressed at the database block level • Compression enabled at either the table or partition level • Completely transparent to applications 7 OLTP Table Compression • Oracle Database 11g extends table compression for OLTP data • Support for conventional...
In this situation, consider increasing thegroup_replication_message_cache_sizelimit with reference to the expected volume of messages in the time period specified by thegroup_replication_member_expel_timeoutsystem variable plus the 5-second detection period, so that the cache contains all the missed...
Lorsque vous rencontrez des problèmes de performances, reportez-vous toujours aux sections appropriées de ce document pour les résoudre. Si vous ne parvenez pas à résoudre le problème vous-même, demandez de l'aide à Oracle.