存储管理器 在Postgres 中,在对表文件管理和操作时,提供了存储管理器(SMGR)的抽象,由于历史原因,早期的系统中,可能存在不同的存储系统,比如磁盘(magnetic disk)、索尼光盘(Sony WORM optical disk jukebox)、持久化主存(persistent main memory)等。 但是目前在操作系统层面,已经提供了文件系统的抽象,所以存储管理器...
在Postgres 中,在对表文件管理和操作时,提供了存储管理器(SMGR)的抽象,由于历史原因,早期的系统中,可能存在不同的存储系统,比如磁盘(magnetic disk)、索尼光盘(Sony WORM optical disk jukebox)、持久化主存(persistent main memory)等。 但是目前在操作系统层面,已经提供了文件系统的抽象,所以存储管理器其实已经没有...
在Postgres 中,在对表文件管理和操作时,提供了存储管理器(SMGR)的抽象,由于历史原因,早期的系统中,可能存在不同的存储系统,比如磁盘(magnetic disk)、索尼光盘(Sony WORM optical disk jukebox)、持久化主存(persistent main memory)等。 但是目前在操作系统层面,已经提供了文件系统的抽象,所以存储管理器其实已经没有...
Postgres数据库基于持久内存的优化探索 Postgres基于持久内存的优化探索 目录 Contents 01 PM介绍 02 适配方案和测试结果 03 进一步探索和挑战 非易失性存储PM的出现必将改变现有存储结构，优化数据访问关键路径。NVM是一种快速、可字节寻址、持久、大容量、读写不对称、寿命有限的新型存储硬件 lMemoryMode：在Bios里设置...
You can use the WAL archive in the primary object store to feed the replica in the other region, without having to provide a streaming connection, if the default maximum RPO of 5 minutes is enough for you. How can instances be stopped or started? Please look at "Fencing" or "Hibernation...
wal_level—Must be set tological, since BDR relies on logical decoding. shared_preload_libraries—Must containbdr, although it can contain other entries before or after, as needed. However, don't includepglogical. track_commit_timestamp—Must be set toonfor conflict resolution to retrieve the ...
Have tried now for 2 days to get a running postgres database up and running on Kubernetes with Azure files mountes as persistent volume - and it just does not work! It works WITHOUT persistent storage - but as soon as I mount Azure files...
() - last_xact_replay_timestamp))::INT END END AS replication_lag_time, last_wal_receive_lsn >= last_wal_replay_lsn AS receiving_streamed_wal, wal_replay_paused, upstream_last_seen, upstream_node_id FROM ( SELECT CURRENT_TIMESTAMP AS ts, pg_catalog.pg_is_in_recovery() AS in_...
enable_spilo_wal_path_compat: false enable_team_id_clustername_prefix: false etcd_host: "" # ignore_instance_limits_annotation_key: "" # kubernetes_use_configmaps: false max_instances: -1 min_instances: -1 resync_period: 30m repair_period: 5m # set_memory_request_to_limi...
> there saying we can't even do WALInsertLockRelease() between updating > XLogCtl and updating sessionBackupState. But that would be very ugly, > because we'd then have to pass a flag to do_pg_stop_backup() saying > whether to remove the callback, since only one caller wants that ...