What is the size limit of Git azure devops repository,in microsoft docs it says 10gb so this 10 gb is for all the repositories collectively or separately for each repositories .
the above link from microsoft states that repositories should generally be no larger than 10GB but i am not clear whether its 10gb for all repositories collectively or separately.
Read the documentation thoroughly. They recommend that repos stay under 10 GB. A recommendation is not the same thing as a limitation.
In uncommon circumstances, repositories may be larger than 10GB. ... For that reason, we do not have a hard block in place.