In my case, it got fixed by turning off Data Collection cache (Magento Admin -> System -> Cache Management -> Select Data Collection Cache and disable it). I had large site, with almost 1 million + products. There are more fix.
Magento: Recoverable Error: Argument 1 passed to Mage_Core_Model_Store :: setWebsite() must be an instance of Mage_Core_Model_Website
Maento saves log in multiple tables which can degrade performance of site has significant visitors. Clean Magento log tables for improved performance.
The script fails with “Segmentation failed” error. I spent hours to debug this problem and found that some problem during inserting data into `catalog_product_entity_text`.
Installation Maxmind GeoIP Python Library in OS X 10.9 (Mavericks), troubleshooting