I show a tip of autovacuum management.

As frequently mentioned, the table bloat problem is one of the most annoying things in managing PostgreSQL. Several things can cause that problem, and Autovacuum is one of them.

I’m developing a new private product, but I’ve not decided the name of it yet. So, I’d like to do a poll about what name is good.

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pgindent maintains the uniform layout style of postgresql related source code.

My first Chinese book has been published on 1st June.

I made a program to calculate ‘A * B mod N’, where A, B and N are 64 bit integers.

Main problem is to avoid overflow when calculate ‘A * B’.

I searched a while and finally decided to use the interleaved modular multiplication method, which is used in the feild of electric circuit design.

I found some bugs when I tested corner cases, so I have to fix them [2018.9.2]. I think I’ve fixed them [2018.9.3]. I’ve just improved it! [2018.9.5]

The program is shown below:

At the end of 2014, I was shocked at the progress of blind deblurring algorithm, so I studied the recent researches in this field.

I read many papers and made a system based on this paper: “Blind deconvolution using alternating maximum a posteriori estimation with heavy-tailed priors”.

I always use my customized statistics views shown below because the original ones provide only minimum information.

I show my tools in this post.

I made a CentOS vagrant box which contains GNOME desktop environment, so I will show how to use and to make it.

I’ll demonstrate how to relocate a tablespace directory without the reconstruction of databases.