MySQL Internals Manual  /  Tracing the Optimizer  /  Tracing Memory Usage

8.7 Tracing Memory Usage

Each remembered trace is a String. It is extended (with realloc()) as optimization progresses and appends data to it. The optimizer_trace_max_mem_size variable sets a limit on the total amount of memory used by all currently remembered traces: If this limit is reached, the current trace isn't extended (so it will be incomplete), and the MISSING_BYTES_BEYOND_MAX_MEM_SIZE column will show the number of bytes missing from this trace.


User Comments
User comments in this section are, as the name implies, provided by MySQL users. The MySQL documentation team is not responsible for, nor do they endorse, any of the information provided here.
Sign Up Login You must be logged in to post a comment.