WebSep 27, 2011 · SET SESSION optimizer_search_depth = 15; -> statistics 5.054150. SET SESSION optimizer_search_depth = 0; -> statistics 0.026904. All of the above are much better than the 58.497217s we got with the default search depth of 62. Note that the value 0 (zero) is a special case where the optimiser chooses and sets the optimal search depth … WebFeb 13, 2009 · The new parameter name could be optimizer_cache_depth or similar. And it controls if the optimizer makes use of QEP cache or not. There will be a relation like below: 0 < optimizer_cache_depth < optimizer_search_depth If such that parameter, optimizer_cache_depth, exists, we can have larger optimizer_search_depth because …
How many JOINs is too many? Tuning optimizer_search_depth for …
WebSET SESSION optimizer_search_depth = 0;-> statistics 0.026904 All of the above are much better than the 58.497217s we got with the default search depth of 62. Note that the value … WebMar 2, 2010 · Description: I see some crashes of mysqld when run with --optimizer-search-depth=63 which is an option advising to not use the greedy join optimizer but the old 4.1 … ol flashlight\u0027s
MySQL Optimization - OroCommerce, OroCRM and OroPlatform Documentation
WebI am kind of hoping that someone might be able to offer some assistance with optimizing a my.cnf file for an extremely high volume mysql database server. Our architecture is as follows: Memory : 96GB CPUs : 12 OS & Mysql : 64-bit Disk Space : 1.2 TB DB Engine : MyISAM Our web application is used by roughly 300 client simultaneously. WebOct 20, 2016 · optimizer_search_depth: Default value is 62, the Planner is generating multiple plans, but sometimes It also generates an incomplete plan. When Query Optimizer starts to scan the plan, we can set optimizer_search_depth value to tell how far each incomplete plan the optimizer should look to evaluate. WebFeb 9, 2024 · Observations, When your log_error is stderr, there is no hope of determining what happened several hours ago to your server. com_rollback counted 18 events in 3,131 seconds and you have NO record of the cause with current configuration. innodb_print_all_deadlocks may help you here. com_stmt_prepare count is usually paired … olf latin root meaning