Can not login to Moodle after upload large file

Today i testing moodle on my server and try to upload video file about 200MB.

For change upload file size i have to change upload_max_filesize and post_max_size on php.ini.

After that I try to upload avi file and get error and cant login to moodle anymore so i think it has something wrong about session.

after searching ppl say that have to change dbsession in mdl_config table so i try to change it in mysql database but i get error "You probably tried to upload too large file. Please refer to documentation for ways to workaround this limit."

The reason of error is i wrong config in php.ini that i should change 3 parameters upload_max_filesize, post_max_size and memory_limit , so when i change all of parameters my moodle system working fine.