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The "Distinguished Name" syntax, applicable for both OpenLDAP and Windows AD configurations, offers flexibility in defining user identity. For OpenLDAP, the format follows this structure: <i>"uid=<username>,ou=people,dc=domain,dc=local"</i>. Windows AD provides an alternative syntax: <i>"<username>@win2kdomain.local"</i>, commonly known as "userPrincipalName (UPN)". In this context, "<username>" represents the specific username provided during the login prompt. This is particularly pertinent when operating in "No Searching" mode, or "Require Group Membership" enabled.
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When performing joins, if they are below this size, they will be kept in memory and never written to a temporary file. As this is a per connection memory allocation, care must be taken not to increase it too high. The sum of the join_buffer_size + sort_buffer_size + read_buffer_size + read_rnd_buffer_size + thread_stack + binlog_cache_size + Core MySQL/MariaDB memory should be below 80%. If the recommendation is negative, you must decrease this and or the sort_buffer_size until the recommendation fits within the allowable memory.
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