Using cbstats
command in our architecture we noticed that there is one point with high timings (>4sec):
chk_persistence_cmd (684 total)
64us - 128us : ( 0.44%) 3
128us - 256us : ( 0.88%) 3
256us - 512us : ( 1.32%) 3
512us - 1ms : ( 1.46%) 1
1ms - 2ms : ( 2.19%) 5 #
2ms - 4ms : ( 3.51%) 9 ##
4ms - 8ms : ( 4.68%) 8 ##
8ms - 16ms : ( 5.26%) 4 #
16ms - 32ms : ( 6.73%) 10 ###
32ms - 65ms : ( 8.92%) 15 ####
65ms - 131ms : ( 10.96%) 14 ####
131ms - 262ms : ( 15.50%) 31 #########
262ms - 524ms : ( 22.66%) 49 ###############
524ms - 1s : ( 34.36%) 80 ########################
1s - 2s : ( 52.05%) 121 #####################################
2s - 4s : ( 84.36%) 221 ####################################################################
4s - 8s : ( 96.93%) 86 ##########################
8s - 16s : (100.00%) 21 ######
What is this? Can someone explain it please?
We would like to decrease this time if it is correlated with Couchbase architecture performance.
Thank you
Matteo