sitemap-tax-post_tag Fatal error

You should split the tag file for older site with lot of tags because right now when im trying to get the tag map i get this error Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 20480 bytes) in /home/sexabulo/domains/tvqc.com/wp-includes/taxonomy.php on line 3250
https://www.tvqc.com/sitemap-tax-post_tag.xml

also is their an option to split post mP by year? i mean RUN a news site and with youR plugin ive at least 50 sitemap to upload to google webmaster