How to reduce the startup time of timesten

Hi guys

We run TT on a PC server and 50G TimesTen data located in a warehouse (NOT of SSD). Every time we start the TimesTen, it costs about 30 minutes, which is a little longer than we expected.

I put RecoveryThreads = 8 to speed up the process of rebuilding indexes, but the process of reading and writing of files check point looks as the main costs of 30 minutes.

Could you tell how to speed up the reading and writing of files of control point to reduce the boot time? Also could you explain why TimesTen need to write checkpoint files at startup. I can easily understand reading the memory checkpoint files (loading data in memory), after loading why TT wirte to checkpoint files?

Concerning

The ttmesg.log will include messages on the number of bytes in a file of control point were read in a certain amount of time, so it is easy to calculate what your reading I/O rate. If you get poor read rates (and therefore take longer to start than desired) TimesTen is embarrassed by this rather than anything that can be tuned in the database. Your speed is about 50GB / 1800 seconds, which is about 30 MB per second. You may want to consider if the I/O reading rate anticipated for your hardware, or if it says improvements are possible. If you are able to locate your files of control point on the SSD or flash, then it is likely to be faster anyway, and then you can take advantage of the parallel control point reads at startup (see the Docs and Note1987463.1 for more details). Readings of parallel to the starting control point are unlikely to help and can actually hinder readings of classical records of spinning.

TimesTen performs a control point at the end of recovery for logs of transaction that he hasn't needed to purge and bring it to a full consistency. The checkpoint also wrote the DB header, which I think has updated during the process of recovery of fields. There may be other reasons for this, but it was always part of the architecture and recovery process.

You could also look at how you close the base database or instance. If you ttDaemonAdmin - stop when there are active connections to the database, you could force the database to be invalidated and therefore much more must be done when you start the instance / reload the database. Note 740819.1 is quite useful to the topic of why you should always try to stop a database free of charge, in order to minimize the time to reboot.

Tags: Database

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http://restoring-health.NET/resources.html

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I'm looking for a software that will speed up the startup time and when I use etc.

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original title: word format

How to reduce the size of the text only 500 CV Ko asked

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Type less. More abbreviate. Choose the unnecessary parts.

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How to reduce the startup time of timesten

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