Search results
Results from the WOW.Com Content Network
Oracle RAC allows multiple computers to run Oracle RDBMS software simultaneously while accessing a single database, thus providing clustering. In a non-RAC Oracle database, a single instance accesses a single database. The database consists of a collection of data files, control files, and redo logs located on disk.
redo log buffer: contains information about database transactions, both committed and uncommitted, in preparation for writing to online redo log files; shared pool: holds the dictionary or row cache, the library cache, cursor definitions and shared SQL. Java pool: holds information for parsing Java statements.
The cache was unable to validate the response, due to an inability to reach the origin server. 112 Disconnected Operation The cache is intentionally disconnected from the rest of the network. 113 Heuristic Expiration The cache heuristically chose a freshness lifetime greater than 24 hours and the response's age is greater than 24 hours.
Oracle Database (commonly referred to as Oracle DBMS, Oracle Autonomous Database, or simply as Oracle) is a proprietary multi-model [4] database management system produced and marketed by Oracle Corporation. It is a database commonly used for running online transaction processing (OLTP), data warehousing (DW) and mixed (OLTP & DW) database ...
Pages in the page cache modified after being brought in are called dirty pages. [5] Since non-dirty pages in the page cache have identical copies in secondary storage (e.g. hard disk drive or solid-state drive), discarding and reusing their space is much quicker than paging out application memory, and is often preferred over flushing the dirty pages into secondary storage and reusing their space.
This cache does not have permission to modify the copy. Unlike the MESI protocol, a shared cache line may be dirty with respect to memory; if it is, one cache has a copy in the Owned state, and that cache is responsible for eventually updating main memory. If no cache holds the line in the Owned state, the memory copy is up to date.
Flush: Snooped request that indicates that an entire cache block is written back to the main memory by another processor. FlushOpt: Snooped request that indicates that an entire cache block is posted on the bus in order to supply it to another processor (Cache to Cache transfers). (Such Cache to Cache transfers can reduce the read miss latency ...
In computing, Oracle Coherence (originally Tangosol Coherence) is a Java-based distributed cache and in-memory data grid.It is claimed to be intended for systems that require high availability, high scalability and low latency, particularly in cases when traditional relational database management systems provide insufficient throughput, or insufficient performance.