Le 25/04/2021 à 15:57, Robert Trevellyan a écrit :
Have you maxed out the RAM? ZFS needs lots of RAM for best performance.
seems the ram is
total used free shared buff/cache available
Mem: 15Gi 14Gi 164Mi 2.0Mi 1.3Gi 1.2Gi
MemTotal: 16290736 kB
MemFree: 1314804 kB
MemAvailable: 2502204 kB
Buffers: 69072 kB
Cached: 716212 kB
SwapCached: 14976 kB
Active: 634184 kB
Inactive: 485584 kB
Active(anon): 222572 kB
Inactive(anon): 122732 kB
Active(file): 411612 kB
Inactive(file): 362852 kB
Unevictable: 19008 kB
Mlocked: 19008 kB
SwapTotal: 523260 kB
SwapFree: 291260 kB
Dirty: 204 kB
Writeback: 0 kB
AnonPages: 341624 kB
Mapped: 114900 kB
Shmem: 2608 kB
KReclaimable: 755220 kB
Slab: 11797212 kB
SReclaimable: 755220 kB
SUnreclaim: 11041992 kB
KernelStack: 6624 kB
PageTables: 7240 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
WritebackTmp: 0 kB
CommitLimit: 8668628 kB
Committed_AS: 1794232 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 826024 kB
VmallocChunk: 0 kB
Percpu: 12480 kB
HardwareCorrupted: 0 kB
AnonHugePages: 0 kB
ShmemHugePages: 0 kB
ShmemPmdMapped: 0 kB
FileHugePages: 0 kB
FilePmdMapped: 0 kB
HugePages_Total: 0
HugePages_Free: 0
HugePages_Rsvd: 0
HugePages_Surp: 0
Hugepagesize: 2048 kB
Hugetlb: 0 kB
DirectMap4k: 13276068 kB
DirectMap2M: 3395584 kB
DirectMap1G: 2097152 kB
mostly used by arc.
Total DISK READ: 12.39 M/s | Total DISK WRITE: 0.00 B/s
Current DISK READ: 6.39 M/s | Current DISK WRITE: 0.00 B/s
TID PRIO USER DISK READ DISK WRITE SWAPIN IO> COMMAND
4180940 be/6 1000112 295.24 K/s 0.00 B/s 0.00 % 99.99 % perl
/usr/share/backuppc/bin/BackupPC_refCountUpdate -m -s -c -P 10 -r 10-15
4180868 be/6 1000112 2.56 M/s 0.00 B/s 0.00 % 99.99 % perl
/usr/share/backuppc/bin/BackupPC_refCountUpdate -m -s -c -P 10 -r 5-9
4180931 be/6 1000112 4.21 M/s 0.00 B/s 0.00 % 99.99 % perl
/usr/share/backuppc/bin/BackupPC_refCountUpdate -m -s -c -P 10 -r 26-31
4180961 be/6 1000112 1058.09 K/s 0.00 B/s 0.00 % 99.99 % perl
/usr/share/backuppc/bin/BackupPC_refCountUpdate -m -s -c -P 10 -r 16-20
4180966 be/6 1000112 1239.63 K/s 0.00 B/s 0.00 % 99.99 % perl
/usr/share/backuppc/bin/BackupPC_refCountUpdate -m -s -c -P 10 -r 0-4
4180937 be/6 1000112 2.64 M/s 0.00 B/s 0.00 % 99.99 % perl
/usr/share/backuppc/bin/BackupPC_refCountUpdate -m -s -c -P 10 -r 21-25
884 be/0 root 40.34 K/s 0.00 B/s 0.00 % 0.00 % [z_rd_int]
885 be/0 root 33.01 K/s 0.00 B/s 0.00 % 0.00 % [z_rd_int]
886 be/0 root 89.86 K/s 0.00 B/s 0.00 % 0.00 % [z_rd_int]
887 be/0 root 90.77 K/s 0.00 B/s 0.00 % 0.00 % [z_rd_int]
888 be/0 root 85.27 K/s 0.00 B/s 0.00 % 0.00 % [z_rd_int]
889 be/0 root 50.43 K/s 0.00 B/s 0.00 % 0.00 % [z_rd_int]
890 be/0 root 27.51 K/s 0.00 B/s 0.00 % 0.00 % [z_rd_int]
891 be/0 root 45.84 K/s 0.00 B/s 0.00 % 0.00 % [z_rd_int]
%Cpu(s): 0.1 us, 0.7 sy, 0.2 ni, 56.1 id, 43.0 wa, 0.0 hi, 0.0 si, 0.0 st
4180961 1000112 30 10 47704 35532 4036 D 1.3 0.2 0:02.73
/usr/bin/perl /usr/share/backuppc/bin/BackupPC_refCountUpdate -m -s -c -P 10 -r
16-20
4180940 1000112 30 10 47744 35496 3968 D 1.0 0.2 0:03.24
/usr/bin/perl /usr/share/backuppc/bin/BackupPC_refCountUpdate -m -s -c -P 10 -r
10-15
884 root 0 -20 0 0 0 S 0.7 0.0 203:37.50
[z_rd_int]
886 root 0 -20 0 0 0 S 0.7 0.0 203:44.14
[z_rd_int]
887 root 0 -20 0 0 0 S 0.7 0.0 203:42.38
[z_rd_int]
889 root 0 -20 0 0 0 S 0.7 0.0 203:39.86
[z_rd_int]
891 root 0 -20 0 0 0 S 0.7 0.0 203:41.30
[z_rd_int]
885 root 0 -20 0 0 0 S 0.3 0.0 203:41.32
[z_rd_int]
888 root 0 -20 0 0 0 S 0.3 0.0 203:46.68
[z_rd_int]
890 root 0 -20 0 0 0 S 0.3 0.0 203:41.32
[z_rd_int]
so we have lots of z_rd_int but its
/usr/share/backuppc/bin/BackupPC_refCountUpdate that do all the io.
--
cordialement,
Ghislain
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