+1 (617) 7782998 |

PageSpeed Admin Interface

The admin interface provides diagnostics and insights into the health and efficiency of the PageSpeed optimizations next to management tools.

New feature as of IISpeed 2.0 / PageSpeed


PageSpeed console admin page

The PageSpeed console displays graphs of server optimization behavior over time, and reports various problems your installation has that can lead to sub-optimal performance. The console graphs metrics for these problems over time so that you can see the result of your changes improving or degrading your performance.

Configuring the console

The console needs to have statistics tracking and statistics logging enabled.

# enable statistics tracking
pagespeed Statistics on
# enable statistics logging
pagespeed StatisticsLogging on
pagespeed LogDir c:\log\pagespeed
# Tell PageSpeed where to expose the interface
pagespeed AdminPath /pagespeed_admin

Histograms Page

PageSpeed histograms admin page

The histograms page shows detailed latency data for visitor page load times, optimizations, the configured optimization caches, and http fetching. The provided histograms can be enriched by enabling latency instrumentation.

Statistics Page

PageSpeed statistics admin page

The statistics page shows server statistics since startup, such as how many resources are being optimized by filters, as well as various latency and cache effectiveness metrics.
The provided statistics can be enriched by enabling latency instrumentation.

Enabling statistics tracking

The following configuration enables statistics tracking

pagespeed EnableStatistics on

Enabling statistics logging

The following configuration enables statistics logging. This will store a snapshot of the statistics to disk periodically for displaying historical data.

pagespeed StatisticsLogging on
pagespeed LogDir c:\log\pagespeed

Configuration Page

PageSpeed configuration admin page

The configuration page displays the interpreted pagespeed configuration, which allows validation of the optimization configuration. you can also view the cache flush timestamp here.

Caches Page

The caches page shows detailed cache configuration information. It can be used to inspect the contents of the cache, and is able to provide an interface to purge the cache.

Log Messages

The logging page displays recent PageSpeed logging output. The log buffer size determines how much data is retained at any given moment.

Message Buffer Size

Determines the number of bytes of shared memory to allocate as a circular buffer for holding recent PageSpeed log messages. By default, the size of this buffer is zero, and no messages will be retained.

pagespeed MessageBufferSize 100000

Enabling the admin interface

The following example enables serving of the admin pages. Note that you might want to use another server module to not expose them to the general public. You can choose the urls that you want to use to expose the admin interface, in the example blow we use /pagespeed_*.

pagespeed AdminPath /pagespeed_admin
pagespeed GlobalAdminPath /pagespeed_global_admin

You can also enable some pages individually.

pagespeed StatisticsPath /pagespeed_statistics
pagespeed GlobalStatisticsPath /pagespeed_global_statistics
pagespeed MessagesPath /pagespeed_message
pagespeed ConsolePath /pagespeed_console


By default PageSpeed collects cross-process statistics. PageSpeed on IIS v 2.0 uses a shim here, and collects statistics separately in each process. While they're mostly intended for debugging and evaluation, the PageSpeed Console depends on them, and statistics are also necessary for limiting concurrent image rewrites and background fetches. It's not recommended to turn them off, as their performance impact is minimal, but if you need to you can do so with:

pagespeed Statistics off

Share View Comments
Some content on this website represents a modified version of the official Google PageSpeed documentation