4.# cat /proc/spl/kstat/zfs/arcstats |grep c_max 5.c_max 4 1553921024 zfs中为了方便查看缓存相关的信息,提供了arc_summary脚本,执行命令如下: 1.# arc_summary -s arc 2... 3.ARC size (current): 0.6 % 11.4 MiB 4. Target size (adaptive): 6.2 % 116.5 MiB 5. Min size (hard limit)...
parm: zfs_arc_max:Max arc size (ulong) parm: zfs_arc_meta_limit:Meta limit for arc size (ulong) parm: zfs_arc_meta_prune:Bytes of meta data to prune (int) parm: zfs_arc_grow_retry:Seconds before growing arc size (int) parm: zfs_arc_p_aggressive_disable:disable aggressive arc_p ...
arc_summary | grep -E 'ARC size \(current\)|Min size \(hard limit\)|Max size \(high water\)|Anonymous metadata size' ARC size (current): 2616.7 % 52.3 GiB Min size (hard limit): 50.0 % 1024.0 MiB Max size (high water): 2:1 2.0 GiB Anonymous metadata size: 99.5 % 50.9 GiB ...
I've noticed that on all of my servers that do not have explicit arc limit set the ZFS arc growing to consume 100% of ram and then I start losing processes due to OOM. I don't know exactly when this started but I recently did some housekeeping and got everything updated to cur...
Obey arc_meta_limit default size when changing arc_max · zfsonlinux@zfs 256fa98 Limit the amount of dnode metadata in the ARC · zfsonlinux/zfs@25458cb 可惜两个修正都只包含在 ZoL >= 0.7.0 里,各位要么从 ZoL源代码创建 dkms deb 包(很容易),要么鸵鸟一下,写入 /sys/module/zfs/parameter...
zfs_arc_max=2147483648 zfs_async_block_max_blocks=5000 zfs_delete_blocks=1000 Essentially, the above settings limit the ARC size to 2GB and they throttle down the aggressiveness of ZFS for deletes. Finally, the database configuration is slightly different between ZFS and ext4. There is a comm...
so it can make sense to limit one or both.when it is important that RAM allocations to other things are served in the least time, you may want to set a limit to the ARC's sizewhen all your major applications manage their data in a cache-aware way (e.g. a postgresql server), it...
69.30% 69.30 GiB Target Size: (Adaptive) 90.07% 90.07 GiB Min Size (Hard Limit): 90.00% 90.00 GiB Max Size (High Water): 1:1 100.00 GiB ARC Size Breakdown: Recently Used Cache Size: 2.17% 1.47 GiB Frequently Used Cache Size: 97.83% 66.20 GiB ARC Hash Breakdown: Elements Max: 4.67M...
Even though the ARC dynamically shrinks and expands relative to memory pressure, it is more efficient to just limit it.In our tests, we have found that it is better (7-200%) to cache inside Innodb rather than ZFS. Note The ARC can be tuned to cache everything, just metadata or ...
volblocksize zoned xattr canmount属性 如果canmount属性设置为off,则不能使用zfs mount或zfs mount-a命令挂载文件系统。将此属性设置为off与将mountpoint属性设置为none的效果相似,区别在于数据集仍有一个可继承的正常mountpoint属性。例如,可将该属性设置为off,为后代文件系统建立可继承属性,但父文件系统本身永远不...