Zypper appears to try to access a lot of FDs based on the rlimit. This causes
it to be extremely slow on VMs.
zypper 1.14.46
Set /etc/security/limits.conf
root soft nofile -1
root hard nofile -1
**With -1:
#time zypper --help
real 0m14.304s
user 0m9.528s
sys 0m4.682s
#time zypper remove -y dstat
real 1m42.602s
user 1m6.997s
sys 0m32.590s
**With 6000:
#time zypper --help
real 0m0.097s
user 0m0.069s
sys 0m0.020s
#time zypper remove -y dstat
real 0m0.958s
user 0m0.574s
sys 0m0.293s
**With 6000000:
#time zypper --help
real 0m3.150s
user 0m1.973s
sys 0m1.151s
#time zypper remove -y dstat
real 0m27.201s
user 0m17.880s
sys 0m9.075s
#strace -f -i /tmp/strace.log zypper help
Here's a snippet that looks like it's trying to close all FDs...
8198 close(5999) = -1 EBADF (Bad file descriptor)
8198 close(5998) = -1 EBADF (Bad file descriptor)
8198 close(5997) = -1 EBADF (Bad file descriptor)
8198 close(5996) = -1 EBADF (Bad file descriptor)
8198 close(5995) = -1 EBADF (Bad file descriptor)
8198 close(5994) = -1 EBADF (Bad file descriptor)
8198 close(5993) = -1 EBADF (Bad file descriptor)
8198 close(5992) = -1 EBADF (Bad file descriptor)
8198 close(5991) = -1 EBADF (Bad file descriptor)
8198 close(5990) = -1 EBADF (Bad file descriptor)
8198 close(5989) = -1 EBADF (Bad file descriptor)
8198 close(5988) = -1 EBADF (Bad file descriptor)
8198 close(5987) = -1 EBADF (Bad file descriptor)
8198 close(5986) = -1 EBADF (Bad file descriptor)
8198 close(5985) = -1 EBADF (Bad file descriptor)
8198 close(5984) = -1 EBADF (Bad file descriptor)
8198 close(5983) = -1 EBADF (Bad file descriptor)
8198 close(5982) = -1 EBADF (Bad file descriptor)
8198 close(5981) = -1 EBADF (Bad file descriptor)
8198 close(5980) = -1 EBADF (Bad file descriptor)
8198 close(5979) = -1 EBADF (Bad file descriptor)
8198 close(5978) = -1 EBADF (Bad file descriptor)
8198 close(5977) = -1 EBADF (Bad file descriptor)
8198 close(5976) = -1 EBADF (Bad file descriptor)