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The method includes, for instance, specifying a unit of storage to be invalidated, the unit of storage including a plurality of pages of storage, and wherein the specifying includes providing a descriptor of the unit of storage; and invalidating the unit of storage. In a further aspect of the present invention, a method of invalidating storage of a computing environment is provided. Additional features and advantages are realized through the techniques of the present invention. System and computer program products corresponding to the above-summarized methods are also described and claimed herein. As examples, a segment of storage, which includes a plurality of pages of storage, or a region of storage, which includes a plurality of segments of storage, is selected to be invalidated. The foregoing and other objects, features, and advantages of the invention are apparent from the following detailed description taken in conjunction with the accompanying drawings in which: In accordance with an aspect of the present invention, a specified portion of storage (e.g., virtual storage) is invalidated.While sometime this works, others don’t; the query cache is “disabled” and you still see the SQL thread in state “invalidating query cache entries (table)”.That is related to a known bug, fixed in My SQL 5.5 : on the old non-Percona servers which caused the replication to halt until the cache was invalidated (Which took a lot of time).
In another aspect of the present invention, an instruction to be executed within a computing environment is provided.
In a further aspect of the present invention, buffer entries (e.g., Translation Lookaside Buffer entries) associated with the storage being invalidated, or other storage, are cleared.
13/349,724 “INVALIDATING A RANGE OF TWO OR MORE TRANSLATION TABLE ENTRIES AND INSTRUCTION THEREFORE” Slegel et al., filed Jan. The invalidation is facilitated by the setting of invalidation indicators located in data structure entries corresponding to the units of storage to be invalidated.
So, the jumpy behaviour is caused by not using a global timestamp for replication delay, but simply the delay behind the last "hop" in the replication chain.
We found this severely annoying and now use My SQL's event scheduler to update a timer table on each master every second, so we can actually see actual delay from the global master (in a non-ring topology) or delay from any peer in a ring.
The instruction includes, for instance, an operation code to identify an instruction to be executed; an invalidation designation to specify information associated with a unit of storage to be invalidated, the unit of storage including a plurality of pages of storage; another designation to specify additional information for use by the instruction; and a clearing designation to specify information associated with one of the unit of storage and another unit of storage for which one or more entries of one or more buffers are to be cleared, wherein one or more components of one or more of the invalidation designation, the another designation and the clearing designation are configurable as no-operations.