sql - Poor performance of INFORMATION_SCHEMA.key_column_usage in MySQL -

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मैं MySQL का संस्करण 5.5.11 चला रहा हूं और INFORMATION_SCHEMA.key_column_usage तालिका की जांच करते समय कार्यक्षमता वास्तव में खराब है।

मेरे पास एक साधारण चयन का अनुरोध है: 

  SELECT REFERENCED_TABLE_NAME, तालिका नाम के रूप में TABLE_NAME, कॉलमनाम के रूप में COLUMN_NAME, CONSTRAINT_SCHEMA AS DB से INFORMATION_SCHEMA.key_column_usage   
 400 पंक्तियां वापस करने के लिए औसत में 8 सेकंड लगते हैं क्या यह एक ज्ञात समस्या है? यदि हां, तो प्रदर्शन में सुधार करने का एक तरीका है (एक पैच हो सकता है?)   
 
 
 वहां दिए गए टिप का उपयोग करके:  
 मैंने सेकंड से एक सौ तक स्विच किया एक ही प्रश्न के लिए मिलिसेकंड यह सेटिंग, मेरा दिन सहेजा गया:  
  innodb_stats_on_metadata = 0

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