Hi,
4 Mio actions per day is pretty much. It seems like the archiving process doesn't have enough server ressources on days where no data was archived. Please have a look into your error-logs and change your settings accordingly.
Same applies to the segmentation data. Please make sure you enable preprocessing for your segments of interest. Then, your segments don't have to be calculated on the fly (which takes very long at that scale). See the option "segmented reports are pre-processed (faster, requires archive.php cron) " when setting up your segment in the segment editor.
At that scale, you should run in an optimized environment - please contact our professional services department at services@piwik.org if you need assistance.
4 Mio actions per day is pretty much. It seems like the archiving process doesn't have enough server ressources on days where no data was archived. Please have a look into your error-logs and change your settings accordingly.
Same applies to the segmentation data. Please make sure you enable preprocessing for your segments of interest. Then, your segments don't have to be calculated on the fly (which takes very long at that scale). See the option "segmented reports are pre-processed (faster, requires archive.php cron) " when setting up your segment in the segment editor.
At that scale, you should run in an optimized environment - please contact our professional services department at services@piwik.org if you need assistance.