[Maria-developers] We Are Allowed To Add No More Than Two New Log Events :)
Hi Monty, I found out why MySQL/Sun generously allowed to add new log events starting only from number 196. How many log events with numbers >= 196 can be added? Only TWO !!! Indeed, each event must have post header length <= 254 because this length must be saved in the uchar post_header_len[] array (the value 255 is reserved as the "undefined" length value). Now, the post header of the Format description event has the length = number_of_events + 57. Hence max number of possible events in MySQL is 254 - 57 = 197. Funny :) Cheers, Alex
Hi!
"Alexi" == Alexi <Alexi1952> writes:
Alexi> Hi Monty, Alexi> I found out why MySQL/Sun generously allowed to add new Alexi> log events starting only from number 196. Alexi> How many log events with numbers >= 196 can be added? Alexi> Only TWO !!! Alexi> Indeed, each event must have post header length <= 254 because Alexi> this length must be saved in the uchar post_header_len[] array Alexi> (the value 255 is reserved as the "undefined" length value). Alexi> Now, the post header of the Format description event has Alexi> the length = number_of_events + 57. Hence max number of Alexi> possible events in MySQL is 254 - 57 = 197. Alexi> Funny :) I am 100 % sure that the person I talked with didn't know/think about this. So, lets then use events starting from 128+32; I will talk with the person again and verify this. Regards, Monty
participants (2)
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Alexi1952 -
Michael Widenius