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201705/20170521_01.md
@@ -497,7 +497,13 @@ postgres=# select pg_terminate_backend(100310);
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pg_terminate_backend | t
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```
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+由于Greenplum是分布式架构,所以有些异常的情况下,在master可能看不到锁等待的罪魁祸首,只能看到等待者,那么需要查询segment才能分析出到底是等待什么,以及如何处理,请参考:
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+[《Greenplum segment级锁问题排查方法 - 阿里云HybridDB for PostgreSQL最佳实践》](../201708/20170822_01.md)
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## 参考
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https://www.postgresql.org/docs/9.6/static/view-pg-locks.html
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https://www.postgresql.org/docs/9.6/static/monitoring-stats.html#PG-STAT-ACTIVITY-VIEW
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