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checkpoint required

checkpoint required

checkpoint required

When I do an onstat -
infomrix tells me that I need to do a checkpoint.
How do i do a checkpoint?

RE: checkpoint required


To force a check point, execute:

onmode -c

Also, from the onmonitor interface, choose the Force-Ckpt option and answer the question.

I must say, I've never seen Informix reply with this warning just by executing onstat -



RE: checkpoint required


Checkpoint, a system event - normally done by the database server (engine) internally as and when required. Considering the crucial nature of the activity i.e., shared memory buffers is synchronized with the data on disk, it is mostly auto in nature.

Checkpoints are initiated by:
1. Checkpoint interval (configuration parameter CKPTINTVL).
2. The physical log becomes 75 percent full.
3. When the LRU_MAX_DIRTY parameter is reached.
4. There are no buffers available in the FreeLRU (FLRU) queue.
5. Certain administrative tasks such as an archive, or adding a dbspace.
6. The admin forces a checkpoint through onmonitor: Force-Ckpt option / onmode -c command

When one issue command one might get a status similar to the following:

Informix Dynamic Server Version 7.31.UC5    -- On-Line (CKPT REQ) -- Up 00:31:28 -- 89264 Kbytes

The information (CKPT REQ) implies that currently there is a request initiated for the System Checkpoint.


RE: checkpoint required

Do you want to force a checkpoint? (y/n)                                         
Warning: checkpoint appears to be stalled and is not complete.
Last checkpoint done  :    Wed Aug  7 08:44:57 2002            
Last checkpoint check :    Wed Dec 31 19:00:00 1969

Why would it stall?

RE: checkpoint required

It looks like a problem i once had, you could try increasing the size of the rootdbs, i worked for me

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