最近我们开始在日志中收到很多死锁错误。（Postgres 服务器 9.6.5）
我们的表由两列组成，一列是自增主键，另一列是 json 对象。来自 json 对象的两个属性被定义为 unique 。现在在日志中，我们不断收到错误，即不同行上的两个简单插入查询相互阻塞。
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process 65325 detected deadlock while waiting for ShareLock on transaction 2934224126 after 1000.050 ms
DETAIL: Process holding the lock: 35530. Wait queue: .
CONTEXT: while inserting index tuple (128,10) in relation "A"
STATEMENT: INSERT INTO A AS t (info) VALUES('{"x":"y",....)
ERROR: deadlock detected
DETAIL: Process 65325 waits for ShareLock on transaction 2934224126; blocked by process 35530.
Process 35530 waits for ShareLock on transaction 2934224125; blocked by process 65325.
Process …