What is the use of Ehcache?
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What is the use of Ehcache?
Ehcache is a standards-based caching API that is used by Integration Server. Caching enables an application to fetch frequently used data from memory (or other nearby resource) rather than having to retrieve it from a database or other back-end system each time the data is needed.
Where does Ehcache store data?
Data stores supported by Ehcache include: On-Heap Store – Utilizes Java’s on-heap RAM memory to store cache entries. This tier utilizes the same heap memory as your Java application, all of which must be scanned by the JVM garbage collector.
What does Ehcache stand for?
It doesn’t really stand for anything. It makes the name a palindrome, so that “Ehcache” reads the same both backwards and forwards, and also evokes the fact that ehcache relies heavily on doubly-linked lists, a data structure that can be traversed both backwards and forwards.
How is Ehcache distributed?
Distributed – The data is held in a Terracotta Server Array with a subset of recently used data held in each application cache node. The distributed topology, available with BigMemory Max, supports a very rich set of consistency modes.
Can Ehcache be distributed?
Distributed caching is available with BigMemory Max.
How do I set the maxdirectmemorysize of a byte buffer?
-XX:MaxDirectMemorySize= Setting Value Default [1[k|K|m|M|g|G] or greater] The value you choose is the limit on memory that can be reserved for all Direct Byte Buffers. If a value is set for this option, the sum of all Direct Byte Buffer sizes cannot exceed the limit.
What is maxdirectmemorysize in Oracle HotSpot?
-XX:MaxDirectMemorySize This Oracle HotSpot option sets a limit on the amount of memory that can be reserved for all Direct Byte Buffers. Syntax -XX:MaxDirectMemorySize= Setting Value Default [1[k|K|m|M|g|G] or greater] The value you choose is the limit on memory that can be reserved for all Direct Byte Buffers.
How does the memorycachetest compare to Ehcache?
The MemoryCacheTest passes for Ehcache but exploits a number of memory leaks in JCS. JCS will give an OutOfMemory error with a default 64M in 10 seconds. Fast —The MemoryStore, being all in memory, is the fastest caching option. All caches specify their maximum in-memory size, in terms of the number of elements, at configuration time.
How to configure diskstore in Ehcache?
The diskStore element in ehcache.xml is optional. If all caches use only MemoryStores, then there is no need to configure a DiskStore. This simplifies configuration, and uses less threads. It is also good when multiple CacheManagers are being used, and multiple disk store paths would need to be configured.
