Waiting to read while creating the data directory lock file. Waiting for I/O on a sub-transaction SLRU buffer. Waiting for SSL while attempting connection. Wait Events of Type BufferPin, Table28.8. PostgreSQL Source Code: src/include/storage/lwlock.h Source File Waiting for a write while initializing a new WAL file. The new locking scheme avoids grabbing system-wide exclusive locks in common code paths. Number of transactions in this database that have been committed, Number of transactions in this database that have been rolled back, Number of disk blocks read in this database, Number of times disk blocks were found already in the buffer cache, so that a read was not necessary (this only includes hits in the PostgreSQL buffer cache, not the operating system's file system cache), Number of rows returned by queries in this database, Number of rows fetched by queries in this database, Number of rows inserted by queries in this database, Number of rows updated by queries in this database, Number of rows deleted by queries in this database, Number of queries canceled due to conflicts with recovery in this database. Monitoring systems should choose whether to represent this as missing data, zero or continue to display the last known value. Serial number of the client certificate, or NULL if no client certificate was supplied or if SSL is not in use on this connection. Sometimes it may be more convenient to obtain just a subset of this information. fastpath function call: The backend is executing a fast-path function. This is consistent with the goal of measuring synchronous commit and transaction visibility delays for recent write transactions. It is quite possible that user has registered the tranche in one of the backends (by having allocation in dynamic shared memory) in which case other backends won't have that information, so we display extension for such cases. Waiting to get the start location of a scan on a table for synchronized scans. PostgreSQL: Documentation: 9.6: The Statistics Collector Waiting for logical rewrite mappings to reach durable storage during a checkpoint. See, One row per connection (regular and replication), showing information about SSL used on this connection. Resets all statistics counters for the current database to zero. Only directly connected standbys are listed; no information is available about downstream standby servers. Waiting for logical replication remote server to change state.
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lwlock buffer_io postgres