Hi Karol,

we have chosen the following solution to avoid temp disk writes:

• Firebird 2.5.8 classic default configuration (with 2 changes see below)
• 456 databases (~379 GB)
• average ~4000 fb_inet_server processes
• 10 GB ramdisk (/ramdisk/fb_temp) for external files and for tempdirectories (chmod 700 for firebird user):
  • ExternalFileAccess = /ramdisk/fb_temp;/hdd_path/fb_temp
  • TempDirectories = /ramdisk/fb_temp;/hdd_path/fb_temp

This 10 GB more than enough for us. Based on the monitoring system data, it has never been completely full.

András