svc_t on iostat -x command is too high is it normal

[Vijay]

I was deleting a directory of lot of files that I had in FreeNAS, and it was taking too long. I opened up a command line and deleted with rm -rf <directory_name> still it is taking too long. I looked at iostat -xd 5 output and saw svc_t too high. Is it normal to see it? Still deletes are slow, in the command line of the FreeNAS server that I have. I particularly have no other issues. when reading and writing. I only noticed this during a delete operation. (I have had snap shots enabled in this directory is it due to that.).

extended device statistics
device r/s w/s kr/s kw/s qlen svc_t %b
md0 0.0 0.2 0.0 0.0 0 0.0 0
md1 0.0 0.0 0.0 0.0 0 0.0 0
md2 0.0 5.2 0.0 0.0 0 0.0 0
da0 0.0 0.0 0.0 0.0 0 0.0 0
da1 9.6 14.8 38.3 324.1 0 23543.2 18
da2 7.6 14.8 30.3 311.4 0 25588.6 13
da3 7.2 15.8 28.7 332.9 1 24937.9 13
da4 7.6 15.8 30.3 321.0 0 24523.8 16
da5 9.6 14.8 38.3 322.5 0 23545.9 24
da6 7.4 15.0 29.5 309.0 0 25590.9 18
da7 37.3 48.7 455.1 489.4 0 213312.5 41
da8 34.9 46.1 377.6 455.1 0 223450.2 40
da9 35.3 48.5 412.0 489.4 1 217657.9 47
da10 33.1 46.7 420.8 423.9 0 226029.4 46
da11 37.7 49.1 482.2 491.0 0 211776.7 53
da12 35.7 46.3 428.7 450.3 0 221347.4 50
cd0 0.0 0.0 0.0 0.0 0 0.0 0
extended device statistics
device r/s w/s kr/s kw/s qlen svc_t %b
md0 0.0 0.0 0.0 0.0 0 0.0 0
md1 0.0 0.0 0.0 0.0 0 0.0 0
md2 0.0 72.7 0.0 0.0 0 0.1 0
da0 0.0 0.0 0.0 0.0 0 0.0 0
da1 9.0 15.0 35.9 332.9 1 16183.3 15
da2 8.8 14.6 35.1 325.8 0 16590.9 15
da3 11.2 14.8 44.7 331.3 0 14959.1 21
da4 7.6 14.8 30.3 315.4 0 17319.2 15
da5 11.2 14.0 44.7 323.4 0 15427.9 22
da6 9.0 13.8 35.9 310.6 0 17022.1 20
da7 26.1 15.8 455.1 187.6 0 170904.1 29
da8 22.4 15.8 389.6 156.5 0 184720.6 24
da9 26.3 16.0 466.3 187.6 0 169571.4 40
da10 24.6 15.8 431.9 180.4 0 176462.7 32
da11 26.1 16.0 479.8 188.4 0 170236.6 40
da12 24.4 15.8 412.8 180.4 0 177183.7 31
cd0 0.0 0.0 0.0 0.0 0 0.0 0
^C

 

[dlavigne]

Try piping the rm command to xargs.

 

[Vijay]

Thank you for the reply I had 70,000 files to delete, took 8 minutes from the command prompt using the rm -rf <directory name> command. I thought, in the unix shell, rm -rf operation should finish very quickly. I was wrong, also my main concern was why svc_t was high. Anyway assume I am finishing this thread, and leave it for any one who notice similar delay to benefit from what I noticed.