Magento – magento 1.9.1.1 permission error – 403 forbidden

When you look at a Mage_XmlConnect.xml from app>etc

<config>
    <modules>
        <Mage_XmlConnect>
            <active>false</active>  <----- look at a this
            <codePool>core</codePool>
            <depends>
                <Mage_Checkout />
                <Mage_Paypal />
                <Mage_Usa />
                <Mage_Tax />
                <Mage_Weee />
                <Mage_Catalog />
                <Mage_CatalogSearch />
                <Mage_CatalogInventory />
                <Mage_Bundle />
                <Mage_Wishlist />
                <Mage_Rating />
                <Mage_Review />
            </depends>
        </Mage_XmlConnect>
    </modules>
</config>

By default it is disabled mode.If you enabled this then it will create table.

As per magento changelog list

Magento Resolved a potential XML External Entity Processing (XXE) exploit that might lead to a Denial of Service attack.

Magento Mobile uses the XmlConnect module to provide mobile phone storefront.Because XmlConnect is disabled by default, users who try to view your mobile storefront might see the error, “The server responded with invalid data.”

For more info Click Here

Normally no, this should not increase much trough this update.

But, its partially normal, that your cron.php needs some CPU, depending which cronjobs you have to run.

With the https://github.com/AOEpeople/Aoe_Scheduler you can investigate, which of your cronjobs needed longer, this should help to identify and fix the real problem.