What is this SQL doing? Is this normal?

[rughooker]

I’ve been having problems with excess cpu useage. I recently had a spike and this code was in the tmp/slow_mysql_queries/ logs.

INSERT INTO `wp_options` (`option_name`, `option_value`, `autoload`) VALUES ('_transient_doing_cron', '1327097261', 'yes') ON DUPLICATE KEY UPDATE `option_name` = VALUES(`option_name`), `option_value` = VALUES(`option_value`), `autoload` = VALUES(`autoload`)

I checked my wp_options table and it is 526 items long. Most start with an option name of _transient_xxxxx. What are these items?

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