wp taking 512M memory per request

Your website is currently inaccessible. Is your host Bluehost? And it looks like you’re using Cloudflare as well?

yes

[09-Mar-2017 11:38:39 UTC] PHP Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 72 bytes) in /home4/rajugl2g/public_html/ifsccodesbi.in/wp-includes/category.php on line 346
[09-Mar-2017 11:48:00 UTC] PHP Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 72 bytes) in /home4/rajugl2g/public_html/ifsccodesbi.in/wp-includes/category.php on line 346
[09-Mar-2017 15:32:58 UTC] PHP Fatal error: Maximum execution time of 30 seconds exceeded in /home4/rajugl2g/public_html/ifsccodesbi.in/wp-includes/taxonomy.php on line 0
[10-Mar-2017 00:58:59 UTC] PHP Fatal error: Maximum execution time of 30 seconds exceeded in /home4/rajugl2g/public_html/ifsccodesbi.in/wp-includes/taxonomy.php on line 0
[10-Mar-2017 00:58:59 UTC] PHP Fatal error: Maximum execution time of 30 seconds exceeded in /home4/rajugl2g/public_html/ifsccodesbi.in/wp-includes/functions.php on line 346
[11-Mar-2017 05:46:57 UTC] PHP Fatal error: Maximum execution time of 30 seconds exceeded in /home4/rajugl2g/public_html/ifsccodesbi.in/wp-includes/taxonomy.php on line 0
[13-Mar-2017 23:40:07 UTC] PHP Fatal error: Maximum execution time of 30 seconds exceeded in /home4/rajugl2g/public_html/ifsccodesbi.in/wp-includes/taxonomy.php on line 0
[14-Mar-2017 13:25:08 UTC] PHP Fatal error: Maximum execution time of 30 seconds exceeded in /home4/rajugl2g/public_html/ifsccodesbi.in/wp-includes/taxonomy.php on line 0
[17-Mar-2017 04:53:29 UTC] PHP Fatal error: Maximum execution time of 30 seconds exceeded in /home4/rajugl2g/public_html/ifsccodesbi.in/wp-includes/taxonomy.php on line 0
[19-Mar-2017 00:23:46 UTC] PHP Fatal error: Maximum execution time of 30 seconds exceeded in /home4/rajugl2g/public_html/ifsccodesbi.in/wp-includes/taxonomy.php on line 0
[20-Mar-2017 03:34:38 UTC] PHP Fatal error: Maximum execution time of 30 seconds exceeded in /home4/rajugl2g/public_html/ifsccodesbi.in/wp-includes/taxonomy.php on line 0
[20-Mar-2017 09:32:33 UTC] PHP Fatal error: Maximum execution time of 30 seconds exceeded in /home4/rajugl2g/public_html/ifsccodesbi.in/wp-includes/taxonomy.php on line 0
[20-Mar-2017 17:50:48 UTC] PHP Fatal error: Maximum execution time of 30 seconds exceeded in /home4/rajugl2g/public_html/ifsccodesbi.in/wp-includes/taxonomy.php on line 0
[21-Mar-2017 06:39:01 UTC] WordPress database error Lost connection to MySQL server during query for query SELECT SQL_CALC_FOUND_ROWS wp_posts.ID FROM wp_posts WHERE 1=1 AND (wp_posts.post_author = 1) AND wp_posts.post_type = ‘post’ AND (wp_posts.post_status = ‘publish’) ORDER BY wp_posts.post_date DESC LIMIT 0, 6 made by require(‘wp-blog-header.php’), wp, WP->main, WP->query_posts, WP_Query->query, WP_Query->get_posts
[21-Mar-2017 17:26:37 UTC] PHP Fatal error: Maximum execution time of 30 seconds exceeded in /home4/rajugl2g/public_html/ifsccodesbi.in/wp-includes/taxonomy.php on line 0
[21-Mar-2017 17:26:42 UTC] PHP Fatal error: Maximum execution time of 30 seconds exceeded in /home4/rajugl2g/public_html/ifsccodesbi.in/wp-includes/taxonomy.php on line 0
[21-Mar-2017 17:26:49 UTC] PHP Fatal error: Maximum execution time of 30 seconds exceeded in /home4/rajugl2g/public_html/ifsccodesbi.in/wp-includes/taxonomy.php on line 0
[22-Mar-2017 07:46:36 UTC] PHP Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 86 bytes) in /home4/rajugl2g/public_html/ifsccodesbi.in/wp-includes/wp-db.php on line 1841
[22-Mar-2017 07:46:36 UTC] PHP Fatal error: Unknown: Cannot use output buffering in output buffering display handlers in Unknown on line 0

its taking 5 + minutes load.

tried p3 profiler but getting internal server error

According to this – Allowed memory size of 268435456 bytes exhausted, you’re still on 256MB limit. I don’t think you can change it on shared hosting as you wish.