checkpoint is a database event. when checkpoint happens, all dirty blocks(pages) in the memory are written to database data files.

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Checkpoint during Backup

Can database process make automatic checkpoint when I'm in process of copying files during ALTER DATABASE BEGIN BACKUP; and ALTER DATABASE END BACKUP; You can assume that process of copying ...
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Checkpoints are occurring too frequently during pg_restore

Under PostgreSQL 9.2.2 (Windows 32 bits), I have a pg_restore command that systematically results in log warnings about the checkpoint frequency, for example: LOG: checkpoints are occurring too ...
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“truncate log on checkpoint” option in SQL Server

Long story but our long term consultants (former employees) wrote a custom script years back (2006 or so) to interface with Tivoli Storage Manager and it appears to be checking for a SQL Server DB ...
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Postgres 9.1.16 Hot Standby

I am using PostgreSQL 9.1.16 (and I cannot upgrade) with Hot Standby. We have a few batches that perform some heavy writes, resulting in a lot of WAL bein produced in a short period of time. The ...
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Checkpoints and Logging

I'm working on getting full grasp of logging architecture. Please correct me if I'm wrong here: I understand that a checkpoint occurs (also lazywriter) to write the dirty pages in the memory to the ...
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How can I solve postgresql problem after deleting wal files?

I turned the archive_mode on on my postgresql configuration for testing a backup server . And since the wal files took lots of disk space, after my test I turned it off and also deleted the wal files. ...
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Are logs in the LDF file being removed after a checkpoint?

Using the fn_dblog I can get the active portion of the online transaction log of my database. But after every checkpoint I can only see 2 entries showing the beginning of the checkpoint ...
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What is an incremental checkpoint (in the context of indirect checkpoints)?

I was using extended events to trace checkpoint activity of a database with indirect checkpoints enabled. The event stream looks like this: And the details of the selected event are: The ...
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Sql Server rollback to some point in time

This seems like a fairly common scenario, yet I'm not sure how to do this. I have a very large database (think a lot of terabytes), which makes it impossible to create a full backup. At some point, I ...
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MS SQL Server - Checkpoint process stuck in SLEEP_BPOOL_FLUSH

We seem to have a problem that came out of nowhere. The checkpoint process is stuck in SLEEP_BPOOL_FLUSH state, and not actually reducing the usage in the log file. This never seemed to happen ...
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What happens when checkpoint_segments reached?

I'm a bit confused with checkpoint_segments definition in PostgreSQL documentation. What happens when checkpoint_segments reached? The dirty pages in shared_buffers written to WAL. Then what is the ...
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What does “thread” mean in “thread checkpoints” context?

The following excerpt is from Oracle concepts. Maybe this is a stupid question, but I really need your help to understand it. My question is: What's does the thread mean in the context thread ...