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Invalidating stale

invalidating stale-42

Caching the query results saves you the time it takes to execute the query.

invalidating stale-45

However, because non-transparent operation may confuse non-expert users, and might be incompatible with certain server applications (such as those for ordering merchandise), the protocol requires that transparency be relaxed Note: The server, cache, or client implementor might be faced with design decisions not explicitly discussed in this specification.When a page is requested, the Elasticsearch search index is queried and the retrieved information is used to build up the web page dynamically.Basically we're using Elasticsearch as a database which the web application queries. For instance, it enables serving fully customized pages based on who is requesting the page, enables showing of personalised content, related content, etc.You can purge by URL or by surrogate key using Soft Purge.This warning message keeps appearing in the log during query execution.Main memory of the system always points to the head of the list and includes indications of memory-line states for fresh, stale or no cache line exists.

A memory line becomes stale when its associated cache line is modified. 6,321,304 which is hereby incorporated by reference. In a multi-processor computer system having a cache sharing linked list comprising a head entry and one or more member entries, a last entry in the list being a tail entry, a method for updating said list comprising the steps of: creating a copy of one member entry; making said copy the head of said list; updating said copy; characterizing all entries other than said head as stale entries; and concurrently invalidating said stale entries in both directions from head-to-tail and from tail-to-head. The method of claim 1 wherein the step of invalidating stale entries in the direction from head-to-tail comprises the steps of: (1) said head informing a next entry that said next entry is about to be invalidated; (2) said next entry informing said head of the identity of said next entry's succeeding entry's; (3) invalidating said entry; (4) making said succeeding entry a next entry; and (5) repeating steps (1) through (4) until invalidation is complete. The method of claim 1 wherein the step of invalidating said stale entries in the direction from head-to-tail comprises the steps of: (1) said head informing a next entry that invalidation of stale copies is about to occur; (2) said next entry informing said head that an invalidation complete signal will be returned to said head; (3) invalidating stale entries in the direction toward said tail; and (4) said next entry, upon being invalidated last, sending said complete signal to said head. The method of claim 1 wherein the step of invalidating said stale entries in the direction from tail-to-head comprises the steps of: (1) said tail entry informing said tail entry's preceding entry that said preceding entry is about to become a tail entry and that said preceding entry will be invalidated after becoming a tail entry; (2) making said preceding entry a tail entry; and (3) repeating steps (1) and (2) until invalidation is complete. The method of claim 1 wherein a request to update said list is associated with said member entry. The method of claim 5 wherein said member entry is said tail entry. The method of claim 1 wherein said method, in accordance with standard cache coherence protocols, updates said list from read-only to read-write. The method of claim 1 comprising the further step of detecting a deadlock condition in said computer system. The method of claim 8 wherein the step of invalidating stale entries in the direction from head-to-tail invalidates the stale entries based on whether said deadlock condition is detected. The method of claim 8 comprising the further step of selecting a slow method for invalidating stale entries if said deadlock condition is detected. In a multi-processor computer system having a cache sharing linked list comprising a head entry and one or more member entries, a last entry in the list being a tail entry, an apparatus for updating said list comprising: means for creating a copy of one member entry; means for making said copy the head of said list; means for updating said copy; means for characterizing all entries other than said head as stale entries; and means for concurrently invalidating said stale entries in both directions from head-to-tail and from tail-to-head. The apparatus of claim 11 wherein the means for invalidating stale entries in the direction from head-to-tail comprises: (1) means for said head to inform a next entry that said next entry is about to be invalidated; (2) means for said next entry to inform said head of the identity of said next entry's succeeding entry; (3) means for invalidating said next entry; (4) means for making said succeeding entry a next entry; and (5) means for using the means for in (1) through (4) until invalidation is complete. The apparatus of claim 11 wherein the means for invalidating said stale entries in the direction from head-to-tail comprises: means for said head to inform a next entry that invalidation of stale copies is about to occur; means for said next entry to inform said head that an invalidation complete signal will be returned to said head; means for invalidating stale entries in the direction toward said tail; and means for said next entry, upon being invalidated last, to send said complete signal to said head. The apparatus of claim 11 wherein the means for invalidating said stale entries in the direction from tail-to-head comprises: (1) means for said tail entry to inform said tail entry's preceding entry that said preceding entry is about to become a tail entry and that said preceding entry will be invalidated after becoming a tail entry; (2) means for making said preceding entry a tail entry; and (3) means for using the means for in (1) and (2) until invalidation is complete. The apparatus of claim 11 wherein a request to update said list is associated with said member entry. The apparatus of claim 15 wherein said member entry is said tail entry. The apparatus of claim 11, in accordance with standard cache coherence protocols, updates said list from read-only to read-write. The apparatus of claim 11 further comprising means for detecting a deadlock condition in said computer system. The apparatus of claim 18 wherein the means for invalidating stale entries in the direction from head-to-tail invalidates the stale entries based on whether said deadlock condition is detected. The apparatus of claim 18 further comprising means for selecting a slow method for invalidating stale entries if said deadlock condition is detected. Field of the Invention This invention relates generally to cache coherence in computer systems having multiple processors with caches, and more particularly to a system and method for updating a cache entry from read-only to read-write.2.

Even if the invalidate metadata statement is done this warning does not dissapear.

Tried INVALIDATE METADATA xxxxand as well INVALIDATE METADATA (without specif the table name) Didnt helped, Any thoughts?

Cache-coherence computer systems represent cache-lines associated with their processors by linked and shared lists, which can be read-only or read-write.

In read-only lists all cache-line copies are the same and may be read by multiple processors at the same time, while read-write lists allow only the head of the list to write to its cache and to invalidate stale cache entries after writing.

Cacheable Result [email protected] value: [5872026465492992, 1] Jdbc Transaction - committed JDBC Connection ------------------------------------------------------------ Query Cache Test - Check get entity is cached Jdbc Transaction - committed JDBC Connection ------------------------------------------------------------ Query Cache Test - Check query is cached Standard Query Cache - Checking cached query results in region: org.hibernate.cache.internal.