Sphinx query takes too much time - sphinx

Question

I am making an index on a table with ~90 000 000 rows. Fulltext search must be done on a varchar field, called email. I also set parent_id as an attribute.
When I run queries to search emails that match words with small amount of hits, they are fired immediately:
mysql> SELECT count(*) FROM users WHERE MATCH('diedsmiling');
+----------+
| count(*) |
+----------+
| 26 |
+----------+
1 row in set (0.00 sec)
mysql> show meta;
+---------------+-------------+
| Variable_name | Value |
+---------------+-------------+
| total | 1 |
| total_found | 1 |
| time | 0.000 |
| keyword[0] | diedsmiling |
| docs[0] | 26 |
| hits[0] | 26 |
+---------------+-------------+
6 rows in set (0.00 sec)
Things get complicated when I am searching for emails that match words with a big amount of hits:
mysql> SELECT count(*) FROM users WHERE MATCH('mail');
+----------+
| count(*) |
+----------+
| 33237994 |
+----------+
1 row in set (9.21 sec)
mysql> show meta;
+---------------+----------+
| Variable_name | Value |
+---------------+----------+
| total | 1 |
| total_found | 1 |
| time | 9.210 |
| keyword[0] | mail |
| docs[0] | 33237994 |
| hits[0] | 33253762 |
+---------------+----------+
6 rows in set (0.00 sec)
Using parent_id attribute, doesn't give any profit:
mysql> SELECT count(*) FROM users WHERE MATCH('mail') AND parent_id = 62003;
+----------+
| count(*) |
+----------+
| 21404 |
+----------+
1 row in set (8.66 sec)
mysql> show meta;
+---------------+----------+
| Variable_name | Value |
+---------------+----------+
| total | 1 |
| total_found | 1 |
| time | 8.666 |
| keyword[0] | mail |
| docs[0] | 33237994 |
| hits[0] | 33253762 |
Here are my sphinx configs:
source src1
{
type = mysql
sql_host = HOST
sql_user = USER
sql_pass = PASS
sql_db = DATABASE
sql_port = 3306 # optional, default is 3306
sql_query = \
SELECT id, parent_id, email \
FROM users
sql_attr_uint = parent_id
}
index test1
{
source = src1
path = /var/lib/sphinx/test1
}
The query that I need to run looks like:
SELECT * FROM users WHERE MATCH('mail') AND parent_id = 62003;
I need to get all emails that match a certain work and have a certain parent_id.
My questions are:
Is there a way to optimize the situation described above? Maybe there is a more convenient matching mode for such type of queries? If I migrate to a server with SSD disks will the performance growth be significant?

Answer 1

Just to get count can just do
Select id from index where match(...) limit 0 option ranker=none; show meta;
And get from total_found.
Will be much more efficient than count[*) which invokes group by.
Or even call keywords('word','index',1); if only single words.