Invalidating query cache entries key mysql


31-Dec-2019 16:40

The query mutex becomes a very hot spot especially if you are using RBR.In fact, with RBR there is a binlog event for each modified row, thus the mutex is acquired for every row. The classic tip is “set global query_cache_size=0” . It often happens to see and hear of replication SQL thread almost always in state “invalidating query cache entries (table)” .The only way to not acquire the query cache mutex in My SQL pre-5.5 is to compile My SQL without query cache. For My SQL 5.5 , to completely disable the query cache (thus, not acquiring the query cache mutex) is required to set query_cache_type=OFF at startup (not at runtime).

The recording and slides for the webinar are available here.To avoid this issue, you need to keep the query cache small (not larger than 512 MB) and de-fragment it from time to time using the FLUSH QUERY CACHE command.



A search for women living in Moscow between 18 and 35 years old who have been active on the site within the last 3 months will turn up more than 1000 profiles. It now sports the same elegant website design as the other Cupid Media sites, as well as the same strong features, including video/audio chat (for premium members) and effective anti-spam measures, such as profile ID verification.… continue reading »


Read more

Russian wives need your attention and care but not your wallet and title.… continue reading »


Read more

For regular chatters, this means better compatibility.… continue reading »


Read more

Since there was no question of preserving the organic form of the correspondence, the entire mass of material has been rearranged.… continue reading »


Read more

Welcome to the most popular gay cam show site on the planet.… continue reading »


Read more

Each culture has particular patterns which determine such choices as whether the man asks the woman out, where people might meet, whether kissing is acceptable on a first date, the substance of conversation, who should pay for meals or entertainment, Since dating can be a stressful situation, there is the possibility of humor to try to reduce tensions.… continue reading »


Read more

Messaging your loved ones will never be the same ever again!… continue reading »


Read more