On the Site Actions menu, point to Site Settings, and then click Modify All Site Settings.

Note:
If you do not see additional items when you point to Site Settings, click Site Settings.

If you are not at the root of your site, under Site Collection Administration, click Go to top level site settings.

Under Site Collection Administration, click Site collection object cache.

In the Object Cache Size section, type a value in the box to specify the amount of memory (in megabytes) that you want the object cache to use.

In the Cross List Query Cache Changes section, select one of the following options:

• If your content changes frequently and you want to display the most accurate results possible, select Check the server for changes every time a cross list query runs.

• On site collections where the improved performance you get from caching does not compromise the accuracy of the results, select Use the cached result of a cross list query for this many seconds.

In the Cross List Query Results Multiplier section, type a number to use as a results multiplier.

Type a larger number if your site collection has unique security permissions applied to many lists and sites. Type a smaller number if your site collection does not have unique permissions on each list or sites. A smaller multiplier uses less memory per query. A higher number will return more results, but it will use more memory and might affect performance. We recommend that you do not use a number higher than 10. However, you should experiment with adjusting this number to determine what effect it will have on performance for your specific scenario.

Click OK.