Hi guys
We have a TT in which the PERM_IN_USE_SIZE/PERM_ALLOCATED_SIZE is about 88%. I check the server using iotop,wmstat,iostat, which shows IO is 100% used very often as file system flush from memory to disk very frequently.
I guess why file system flush so frequently is because the data in TT is so BIG, we need to reduce to data in TT. Furthermore, the bigger TT is, more resources TT needs from server?
Does it make sense?
Thanks for your information.
Command> dssize;
The following values are in KB:
PERM_ALLOCATED_SIZE: 88064000
PERM_IN_USE_SIZE: 77531330
PERM_IN_USE_HIGH_WATER: 85391809
TEMP_ALLOCATED_SIZE: 6144000
TEMP_IN_USE_SIZE: 695048
TEMP_IN_USE_HIGH_WATER: 1177342
free -m
total used free shared buffers cached
Mem: 129050 128656 393 85017 79 106287
-/+ buffers/cache: 22289 106761
Swap: 9999 366 9633
iostat -dxk 1
Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util
sda 1.00 25820.00 23.00 503.00 536.00 105004.00 401.29 168.69 286.34 1.90 100.10
dm-0 0.00 0.00 24.00 26403.00 496.00 105612.00 8.03 8632.55 299.63 0.04 100.00
dm-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util
sda 2.00 23102.00 18.00 465.00 344.00 94256.00 391.72 165.79 379.61 2.07 100.00
dm-0 0.00 0.00 17.00 23496.00 388.00 93984.00 8.03 8558.33 397.66 0.04 100.00
dm-1 0.00 0.00 3.00 0.00 12.00 0.00 8.00 0.07 22.00 7.33 2.20
Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await svctm %util
sda 0.00 24960.00 33.00 556.00 628.00 105472.00 360.27 162.01 283.17 1.70 100.00
dm-0 0.00 0.00 32.00 25493.00 560.00 101972.00 8.03 7900.35 319.87 0.04 100.00
dm-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
iotop
Total DISK READ: 0.00 B/s | Total DISK WRITE: 101.52 M/s
TID PRIO USER DISK READ DISK WRITE SWAPIN IO> COMMAND
1176 be/4 root 0.00 B/s 627.98 K/s 0.00 % 73.64 % [flush-253:0]
2032 be/4 timesten 0.00 B/s 624.60 K/s 0.00 % 73.35 % timestensubd -verbose -userlog tterrors.log -supportlog ttmesg.log -id 1000000 -facility user
509 be/3 root 0.00 B/s 10.13 K/s 0.00 % 41.88 % [jbd2/dm-0-8]
2029 be/4 timesten 0.00 B/s 371.38 K/s 0.00 % 23.68 % timestensubd -verbose -userlog tterrors.log -supportlog ttmesg.log -id 1000000 -facility user
10601 be/4 root 0.00 B/s 13.99 M/s 0.00 % 0.00 % java -Djava.util.logging.config.file=/opt/tomdeliver01/conf/logging.~r=/opt/tomdeliver01/temp org.apache.catalina.startup.Bootstrap start
1 be/4 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % init
Regards
Li