ZFS ZFS slowdowns

Hello,

I have been noticing slowdowns on my zpool at random times. When this slowdown happens, zpool iostat -v 1 shows:

Code:
                   capacity     operations    bandwidth
pool            alloc   free   read  write   read  write
--------------  -----  -----  -----  -----  -----  -----
bootpool         486M  1.51G      0      0      0      0
  mirror         486M  1.51G      0      0      0      0
    gpt/boot0       -      -      0      0      0      0
    gpt/boot1       -      -      0      0      0      0
    gpt/boot2       -      -      0      0      0      0
    gpt/boot3       -      -      0      0      0      0
    gpt/boot4       -      -      0      0      0      0
    gpt/boot5       -      -      0      0      0      0
    gpt/boot6       -      -      0      0      0      0
    gpt/boot7       -      -      0      0      0      0
--------------  -----  -----  -----  -----  -----  -----
zroot           3.48T  10.9T    484      0  1.89M      0
  raidz3        3.48T  10.9T    484      0  1.89M      0
    da1p4.eli       -      -      0      0      0      0
    da0p4.eli       -      -      0      0      0      0
    da2p4.eli       -      -      0      0      0      0
    da3p4.eli       -      -    252      0  1011K      0
    ada2p4.eli      -      -      0      0      0      0
    ada3p4.eli      -      -      0      0      0      0
    ada0p4.eli      -      -      0      0      0      0
    ada1p4.eli      -      -    231      0   927K      0
--------------  -----  -----  -----  -----  -----  -----

There are 2 disks that have constant read rates of about 300K while the rest are at 0K. What is going on here?

When this happens, read/writes to the system are delayed. I was trying to do a zfs send/receive to the machine which would start by sending a few KB and then stall.

Thanks,
Manas
 
Back
Top