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For instance, this statement: With this rewrite in effect, we know exactly which rows are affected, by primary key, and we also document them as a SQL comment.The replication stream then doesn’t contain the expensive WHERE clauses, but only the UPDATE statements by primary key.
Core features: Jet Profiler focuses on queries, tables and users.
This gives you the information you need most in order to quickly fix performance problems in your code, such as most frequent queries, most used tables or busiest users.
In My SQL 5.7 , this guarantee is strengthened slightly to preventing loss of any transactions that were ever committed on the original master, eliminating so-called phantom reads.
On the other hand these behaviors also give a requirement that each shard must have at least 2 tablets with type type slave from which queries will always return up-to-date results.
See the schema swap tutorial for a detailed example.
This operation, which is called schema swap, works as follows: With this process, the only guarantee we need is for the change (schema or data) to be backward compatible: the clients won’t know if they talk to a server that has applied the change yet or not.This is usually fairly easy to deal with: Note the real change is only applied to one instance.We then rely on the backup / restore process to propagate the change.Data is collected, analyzed and displayed in real-time in diagrams, pie charts and tables.You can easily drill down and navigate through the data. Jet Profiler is a desktop application which runs on your computer.We have plans to make this Update Stream feature more consistent, very resilient, fast, and transparent to sharding.Tags: Adult Dating, affair dating, sex dating