TypeOrm के साथ निष्पादित होने पर एक कच्ची PostgreSQL क्वेरी हैंग हो जाती है

एक समस्या निवारण सत्र के बाद हमें पता चला कि क्वेरी को लॉक किया जा रहा था क्योंकि कोई अन्य कनेक्शन संबंधित संसाधन (users में एक रिकॉर्ड) को अपडेट करने का प्रयास कर रहा था। user_images_image . से विदेशी कुंजी वाली तालिका ) एक ही तरीके से एक अलग लेनदेन के लिए, दोनों इसके परिणामों की प्रतीक्षा कर रहे हैं।

उसी कनेक्शन का उपयोग करके हम सही व्यवहार के साथ समाप्त हुए।

हमने लॉक मॉनिटरिंग क्वेरी दस्तावेज़ों से का उपयोग करके इसका पता लगाया। :

SELECT blocked_locks.pid     AS blocked_pid,
         blocked_activity.usename  AS blocked_user,
         blocking_locks.pid     AS blocking_pid,
         blocking_activity.usename AS blocking_user,
         blocked_activity.query    AS blocked_statement,
         blocking_activity.query   AS current_statement_in_blocking_process,
         blocked_activity.application_name AS blocked_application,
         blocking_activity.application_name AS blocking_application
   FROM  pg_catalog.pg_locks         blocked_locks
    JOIN pg_catalog.pg_stat_activity blocked_activity  ON blocked_activity.pid = blocked_locks.pid
    JOIN pg_catalog.pg_locks         blocking_locks 
        ON blocking_locks.locktype = blocked_locks.locktype
        AND blocking_locks.DATABASE IS NOT DISTINCT FROM blocked_locks.DATABASE
        AND blocking_locks.relation IS NOT DISTINCT FROM blocked_locks.relation
        AND blocking_locks.page IS NOT DISTINCT FROM blocked_locks.page
        AND blocking_locks.tuple IS NOT DISTINCT FROM blocked_locks.tuple
        AND blocking_locks.virtualxid IS NOT DISTINCT FROM blocked_locks.virtualxid
        AND blocking_locks.transactionid IS NOT DISTINCT FROM blocked_locks.transactionid
        AND blocking_locks.classid IS NOT DISTINCT FROM blocked_locks.classid
        AND blocking_locks.objid IS NOT DISTINCT FROM blocked_locks.objid
        AND blocking_locks.objsubid IS NOT DISTINCT FROM blocked_locks.objsubid
        AND blocking_locks.pid != blocked_locks.pid
 
    JOIN pg_catalog.pg_stat_activity blocking_activity ON blocking_activity.pid = blocking_locks.pid
   WHERE NOT blocked_locks.GRANTED;