More number of records in wp_options table

Hi, Im looking for some help with my wp_options table.

recently I noticed more than twenty thousand of lines in the table.

Query Details:

SELECT COUNT(1) FROM wp_options WHERE option_name=’cron’;

+———-+
| COUNT(1) |
+———-+
| 11632 |
+———-+
1 row in set (0.01 sec)

SELECT COUNT(1) FROM wp_options WHERE option_name=’_transient_update_core’;
+———-+
| COUNT(1) |
+———-+
| 4465 |
+———-+
1 row in set (0.01 sec)

SELECT COUNT(1) FROM wp_options WHERE option_name=’_transient_update_plugins’;
+———-+
| COUNT(1) |
+———-+
| 4463 |
+———-+
1 row in set (0.00 sec)

SELECT COUNT(1) FROM wp_options WHERE option_name=’_transient_update_themes’;
+———-+
| COUNT(1) |
+———-+
| 4463 |
+———-+
1 row in set (0.00 sec)

Due to these huge number of rows,web pages are not loading.

WordPress Version:2.8.1

Can anyone help me to sort this issue

Regards,
Coumar