If something outside of OJS is terminating the process, it is probably some form of memory manager running on your server. Check with your system administrator or hosting provider to see what the largest allowed memory size is for your processes. They may be able to increase this for you temporarily or permanently. You can also try splitting your XML imports into smaller parts. For example, you might export and import just one issue at a time.
And i have kept all issues to be imported in external hard disk drive (250 GB is free) and our application is hosted on ubuntu and it has 6.5Gb free space
i want to transfer issues from one ojs instance to another(each instance present in different servers)
Any other ways to import?
If you are running the process in the background, I presume you are running the import from the command line. Can you share the command line you are using, and the exact output from the command, including the message about the process being “Killed”?
Oct 14 06:38:42 ojs kernel: [11527786.609523] Out of memory: Kill process 46738 (php) score 761 or sacrifice child
Oct 14 06:38:42 ojs kernel: [11527786.619933] Killed process 46738 (php) total-vm:11510476kB, anon-rss:11245172kB, file-rss:0kB
You are exceeding your available system memory (RAM). You will need to cut down the size of the imports by breaking them into smaller chunks, or you will need to add memory to the machine instance. There may be another process running which is consuming a large amount of memory. Try running top or a similar command to get an idea of what your baseline memory usage is, and what is available for PHP.