Good Morning, I am having problems with Koha returning the following error: Koha error The following fatal error has occurred: Can't connect to local MySQL server through socket '/var/run/mysqld/mysqld.sock' (2) at /usr/share/perl/5.8/CGI/Carp.pm line 314. Compilation failed in require at /usr/share/koha/lib/C4/Auth.pm line 30. BEGIN failed--compilation aborted at /usr/share/koha/lib/C4/Auth.pm line 30. Compilation failed in require at /usr/share/koha/opac/cgi-bin/opac/opac-detail.pl line 25. BEGIN failed--compilation aborted at /usr/share/koha/opac/cgi-bin/opac/opac-detail.pl line 25. If I refresh the page it usually works, but this error appears more often than not since yesterday morning. I looked at some performance items suspecting that it may be related to slow response from the underlying system. top - 08:31:07 up 20:01, 1 user, load average: 0.21, 0.24, 0.25 # for i in a b; do hdparm -tT /dev/sd"$i"; done /dev/sda: Timing cached reads: 2166 MB in 1.88 seconds = 1152.66 MB/sec Timing buffered disk reads: 22 MB in 3.28 seconds = 6.71 MB/sec /dev/sdb: Timing cached reads: 2530 MB in 1.87 seconds = 1355.50 MB/sec Timing buffered disk reads: 34 MB in 3.32 seconds = 10.24 MB/sec # mount /dev/sda1 on / type ext3 (rw,relatime,errors=remount-ro) proc on /proc type proc (rw,noexec,nosuid,nodev) /sys on /sys type sysfs (rw,noexec,nosuid,nodev) varrun on /var/run type tmpfs (rw,noexec,nosuid,nodev,mode=0755) varlock on /var/lock type tmpfs (rw,noexec,nosuid,nodev,mode=1777) udev on /dev type tmpfs (rw,mode=0755) devshm on /dev/shm type tmpfs (rw) devpts on /dev/pts type devpts (rw,gid=5,mode=620) /dev/sdb1 on /var/lib type ext3 (rw,relatime,errors=remount-ro) It looks to me like the drives are slow. Not all that surprising considering that there are 6 virtual machines running off the same hyper-V host. What can I do to increase the performance under these conditions, or am I on the wrong track entirely? Best regards, Robert Meltz