I know that General GA data is sent using 1 pixel .gif of request data. In cases where the total amount [key, value] , the maximum fixed value. One limiting factor was the IE of older browsers with maximum bytes (not sure, but I assumed that it was 2048 bytes for all values).
I also suggested that it was encoded in UTF-8 (multibyte encoding of variable length), where a character can take 1-4 bytes in length. At some point in time, I read that the maximum character limit for a custom value is 150 characters. At that time, I did not need to know anything better.
In the case of Universal GA, partstored on the GA server and never sent. If I am not mistaken, each user value has a separate request.
ga('create', 'UA-xxxxxxxx-x', 'xxx');
ga('set', {
'dimension1': '...',
'dimension2': '...',
'dimension3': '...',
'dimension4': '...',
'dimension5': '...'
});
ga('send', 'pageview');
My question is, can meany bytes / characters in the case of Universal GA? '...'
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