RDS High CPU utilization - mysql

Question

I am facing high CPU utilization issue, is too many concurrent create temporary table statement cause high CPU utilization?
Is there any query through that we can capture queries which causing high CPU utilization?
Variable we set:-
tmp_table_size = 1G
max_heap_table_size = 1G
innodb_buffer_pool_size = 145 G
innodb_buffer_pool_instance = 8
innodb_page_cleaner = 8
Status Variables:-
mysql> show global status like '%tmp%';
+-------------------------+-----------+
| Variable_name | Value |
+-------------------------+-----------+
| Created_tmp_disk_tables | 60844516 |
| Created_tmp_files | 135751 |
| Created_tmp_tables | 107643364 |
+-------------------------+-----------+
mysql> show global status like '%innodb_buffer%';
+---------------------------------------+--------------------------------------------------+
| Variable_name | Value |
+---------------------------------------+--------------------------------------------------+
| Innodb_buffer_pool_dump_status | Dumping of buffer pool not started |
| Innodb_buffer_pool_load_status | Buffer pool(s) load completed at 170917 19:11:45 |
| Innodb_buffer_pool_resize_status | |
| Innodb_buffer_pool_pages_data | 8935464 |
| Innodb_buffer_pool_bytes_data | 146398642176 |
| Innodb_buffer_pool_pages_dirty | 18824 |
| Innodb_buffer_pool_bytes_dirty | 308412416 |
| Innodb_buffer_pool_pages_flushed | 122454921 |
| Innodb_buffer_pool_pages_free | 188279 |
| Innodb_buffer_pool_pages_misc | 377817 |
| Innodb_buffer_pool_pages_total | 9501560 |
| Innodb_buffer_pool_read_ahead_rnd | 0 |
| Innodb_buffer_pool_read_ahead | 585245 |
| Innodb_buffer_pool_read_ahead_evicted | 14383 |
| Innodb_buffer_pool_read_requests | 304878851665 |
| Innodb_buffer_pool_reads | 10537188 |
| Innodb_buffer_pool_wait_free | 0 |
| Innodb_buffer_pool_write_requests | 14749510186 |
+---------------------------------------+--------------------------------------------------+

Answer 1

Step 1 -
show processlist
Find is any process is locking table if yes than change it to myisam.
Step 2 -
Check Ram and your db size
Step 3 -
Explain complex queries and check if file sort or maximum number od rows are getting scan remove it either by making table flat , not more than 4 sub queries
Step 4 -
Use of joins efficiently