Milan Babuskov wrote:

>> I/O error for file "<DB_FILENAME>" Error while trying to open file
>> Too many open files
> To see what is your OS limit and to increase it, you can use ulimit
> command. To show the limit:
>
> ulimit -n
>
> To change it to, for example, 4096:
>
> ulimit -n 4096

I forgot, there are some other limits too. Check these values:

cat /proc/sys/fs/file-max
sysctl fs.file-max

To increase that you can use the sysctl command.

There is also per-user limit on some systems, so better check:

/etc/security/limits.conf
/etc/limits

if they exist on your system.

--
Milan Babuskov
http://www.guacosoft.com