linux – 无法交换,但有足够的物理内存可用
作者:互联网
关闭交换我有一个奇怪的问题.
服务器有192 GB内存,154 GB可用.
它是一个运行许多Linux KVM虚拟机的Hypervisor.
当试图:
# swapoff -a
swapoff: /dev/sda2: swapoff failed: Cannot allocate memory
但记忆是免费的:
# cat /proc/meminfo
MemTotal: 197805748 kB
MemFree: 162274264 kB
MemAvailable: 162388912 kB
Buffers: 432 kB
Cached: 353524 kB
SwapCached: 221828 kB
Active: 28253440 kB
Inactive: 5349056 kB
Active(anon): 28159204 kB
Inactive(anon): 5289320 kB
Active(file): 94236 kB
Inactive(file): 59736 kB
Unevictable: 0 kB
Mlocked: 0 kB
SwapTotal: 124999676 kB
SwapFree: 124534724 kB
Dirty: 796 kB
Writeback: 0 kB
AnonPages: 33063024 kB
Mapped: 59236 kB
Shmem: 199984 kB
Slab: 313264 kB
SReclaimable: 206596 kB
SUnreclaim: 106668 kB
KernelStack: 10784 kB
PageTables: 94012 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 223902548 kB
Committed_AS: 43094824 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 794656 kB
VmallocChunk: 34358685284 kB
HardwareCorrupted: 0 kB
AnonHugePages: 32186368 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
DirectMap4k: 136564 kB
DirectMap2M: 8136704 kB
DirectMap1G: 195035136 kB
有谁知道原因是什么?
解决方法:
试试吧:
sync ; echo 3 > /proc/sys/vm/drop_caches
然后
swapoff
或者临时添加新的交换文件
标签:linux,memory,centos,swap,virtual-memory 来源: https://codeday.me/bug/20190810/1638426.html