[PVE-User] performance of 4.2 versus 3.4

[Miguel González]

Hi,

  I have a software RAID of 2 Tb HDs. I have upgraded from 3.4 to 4.2
and migrated the VMs that I had.

  I have realized backups are taking three times than before. I used to
get 30 Mb/s as average for a backup and now I get around 10 Mb/s. The
performance seems to drop after start.

  102: Sep 11 15:17:50 INFO: status: 0% (98828288/274877906944), sparse
0% (3125248), duration 3, 32/31 MB/s
102: Sep 11 15:20:45 INFO: status: 1% (2767192064/274877906944), sparse
0% (425738240), duration 178, 15/12 MB/s
102: Sep 11 15:25:39 INFO: status: 2% (5500174336/274877906944), sparse
0% (691355648), duration 472, 9/8 MB/s
102: Sep 11 15:33:58 INFO: status: 3% (8252162048/274877906944), sparse
0% (1068974080), duration 971, 5/4 MB/s
102: Sep 11 15:42:18 INFO: status: 4% (11327242240/274877906944), sparse
0% (2668666880), duration 1471, 6/2 MB/s
102: Sep 11 15:43:29 INFO: status: 5% (13744734208/274877906944), sparse
1% (4710879232), duration 1542, 34/5 MB/s
102: Sep 11 15:52:00 INFO: status: 6% (16493248512/274877906944), sparse
2% (5582757888), duration 2053, 5/3 MB/s
102: Sep 11 16:00:07 INFO: status: 7% (19305791488/274877906944), sparse
2% (6777946112), duration 2540, 5/3 MB/s
102: Sep 11 16:01:16 INFO: status: 8% (21993553920/274877906944), sparse
3% (9289428992), duration 2609, 38/2 MB/s
102: Sep 11 16:13:49 INFO: status: 9% (24741281792/274877906944), sparse
3% (9826746368), duration 3362, 3/2 MB/s
102: Sep 11 16:15:50 INFO: status: 10% (27600945152/274877906944),
sparse 4% (12201222144), duration 3483, 23/4 MB/s
102: Sep 11 16:16:06 INFO: status: 11% (30475550720/274877906944),
sparse 5% (15024570368), duration 3499, 179/3 MB/s
102: Sep 11 16:16:24 INFO: status: 12% (33080868864/274877906944),
sparse 6% (17548828672), duration 3517, 144/4 MB/s
102: Sep 11 16:16:39 INFO: status: 13% (35794845696/274877906944),
sparse 7% (20204036096), duration 3532, 180/3 MB/s
102: Sep 11 16:18:12 INFO: status: 14% (38648938496/274877906944),
sparse 8% (22802001920), duration 3625, 30/2 MB/s
102: Sep 11 16:19:03 INFO: status: 15% (41313632256/274877906944),
sparse 9% (25259786240), duration 3676, 52/4 MB/s
102: Sep 11 16:19:19 INFO: status: 16% (44355354624/274877906944),
sparse 10% (28259188736), duration 3692, 190/2 MB/s
102: Sep 11 16:19:27 INFO: status: 17% (46843101184/274877906944),
sparse 11% (30695702528), duration 3700, 310/6 MB/s
102: Sep 11 16:19:31 INFO: status: 18% (49512448000/274877906944),
sparse 12% (33338658816), duration 3704, 667/6 MB/s
102: Sep 11 16:20:07 INFO: status: 19% (52250279936/274877906944),
sparse 13% (35924496384), duration 3740, 76/4 MB/s
102: Sep 11 16:27:03 INFO: status: 20% (54986539008/274877906944),
sparse 13% (36837548032), duration 4156, 6/4 MB/s
102: Sep 11 16:38:20 INFO: status: 21% (57730924544/274877906944),
sparse 13% (37141852160), duration 4833, 4/3 MB/s
102: Sep 11 16:54:05 INFO: status: 22% (60478914560/274877906944),
sparse 13% (37384355840), duration 5778, 2/2 MB/s
102: Sep 11 17:06:38 INFO: status: 23% (63270092800/274877906944),
sparse 13% (37755158528), duration 6531, 3/3 MB/s
102: Sep 11 17:18:38 INFO: status: 24% (65971683328/274877906944),
sparse 13% (38161530880), duration 7251, 3/3 MB/s
102: Sep 11 17:27:59 INFO: status: 25% (68727472128/274877906944),
sparse 14% (38863835136), duration 7812, 4/3 MB/s
102: Sep 11 17:34:45 INFO: status: 26% (71475658752/274877906944),
sparse 14% (39950573568), duration 8218, 6/4 MB/s
102: Sep 11 17:43:49 INFO: status: 27% (74227646464/274877906944),
sparse 14% (40587501568), duration 8762, 5/3 MB/s
102: Sep 11 17:47:03 INFO: status: 28% (76968230912/274877906944),
sparse 15% (42354982912), duration 8956, 14/5 MB/s
102: Sep 11 17:50:04 INFO: status: 29% (79811444736/274877906944),
sparse 16% (44452319232), duration 9137, 15/4 MB/s
102: Sep 11 17:51:48 INFO: status: 30% (82502615040/274877906944),
sparse 16% (46625193984), duration 9241, 25/4 MB/s
102: Sep 11 17:54:04 INFO: status: 31% (85239201792/274877906944),
sparse 17% (48626528256), duration 9377, 20/5 MB/s
102: Sep 11 17:55:56 INFO: status: 32% (87972380672/274877906944),
sparse 18% (50729697280), duration 9489, 24/5 MB/s
102: Sep 11 17:57:52 INFO: status: 33% (90723909632/274877906944),
sparse 19% (52973953024), duration 9605, 23/4 MB/s
102: Sep 11 18:00:44 INFO: status: 34% (93464952832/274877906944),
sparse 20% (54998253568), duration 9777, 15/4 MB/s
102: Sep 11 18:04:31 INFO: status: 35% (96289161216/274877906944),
sparse 20% (56889286656), duration 10004, 12/4 MB/s
102: Sep 11 18:06:28 INFO: status: 36% (98957787136/274877906944),
sparse 21% (58669006848), duration 10121, 22/7 MB/s
102: Sep 11 18:12:24 INFO: status: 37% (101724717056/274877906944),
sparse 21% (59694661632), duration 10477, 7/4 MB/s
102: Sep 11 18:14:57 INFO: status: 38% (104453898240/274877906944),
sparse 22% (61591572480), duration 10630, 17/5 MB/s
102: Sep 11 18:17:34 INFO: status: 39% (107243896832/274877906944),
sparse 23% (63611092992), duration 10787, 17/4 MB/s
102: Sep 11 18:21:24 INFO: status: 40% (109961674752/274877906944),
sparse 23% (64768167936), duration 11017, 11/6 MB/s
102: Sep 11 18:28:45 INFO: status: 41% (112706060288/274877906944),
sparse 23% (65610612736), duration 11458, 6/4 MB/s
102: Sep 11 18:34:09 INFO: status: 42% (115450445824/274877906944),
sparse 24% (66826821632), duration 11782, 8/4 MB/s
102: Sep 11 18:43:06 INFO: status: 43% (118213836800/274877906944),
sparse 24% (67609219072), duration 12319, 5/3 MB/s
102: Sep 11 18:51:16 INFO: status: 44% (120946819072/274877906944),
sparse 24% (68440182784), duration 12809, 5/3 MB/s
102: Sep 11 18:58:48 INFO: status: 45% (123702607872/274877906944),
sparse 25% (69251084288), duration 13261, 6/4 MB/s
102: Sep 11 19:08:20 INFO: status: 46% (126450794496/274877906944),
sparse 25% (69731921920), duration 13833, 4/3 MB/s
102: Sep 11 19:17:12 INFO: status: 47% (129195180032/274877906944),
sparse 25% (70119866368), duration 14365, 5/4 MB/s
102: Sep 11 19:26:36 INFO: status: 48% (131950968832/274877906944),
sparse 25% (70704701440), duration 14929, 4/3 MB/s
102: Sep 11 19:38:31 INFO: status: 49% (134691553280/274877906944),
sparse 25% (71038054400), duration 15644, 3/3 MB/s
102: Sep 11 19:47:54 INFO: status: 50% (137443540992/274877906944),
sparse 26% (71703040000), duration 16207, 4/3 MB/s
102: Sep 11 19:58:24 INFO: status: 51% (140191727616/274877906944),
sparse 26% (72353959936), duration 16837, 4/3 MB/s
102: Sep 11 20:04:41 INFO: status: 52% (143015936000/274877906944),
sparse 26% (73694216192), duration 17214, 7/3 MB/s
102: Sep 11 20:06:04 INFO: status: 53% (145699504128/274877906944),
sparse 27% (75939971072), duration 17297, 32/5 MB/s
102: Sep 11 20:07:19 INFO: status: 54% (148576206848/274877906944),
sparse 28% (78477987840), duration 17372, 38/4 MB/s
102: Sep 11 20:19:31 INFO: status: 55% (151184474112/274877906944),
sparse 28% (78726025216), duration 18104, 3/3 MB/s
102: Sep 11 20:35:50 INFO: status: 56% (153932660736/274877906944),
sparse 28% (78788358144), duration 19083, 2/2 MB/s
102: Sep 11 20:48:18 INFO: status: 57% (156684648448/274877906944),
sparse 28% (79245254656), duration 19831, 3/3 MB/s
102: Sep 11 20:53:15 INFO: status: 58% (159432835072/274877906944),
sparse 29% (80902402048), duration 20128, 9/3 MB/s
102: Sep 11 20:57:11 INFO: status: 59% (162219032576/274877906944),
sparse 30% (82823421952), duration 20364, 11/3 MB/s
102: Sep 11 21:00:23 INFO: status: 60% (164929208320/274877906944),
sparse 30% (84812386304), duration 20556, 14/3 MB/s
102: Sep 11 21:01:06 INFO: status: 61% (167693582336/274877906944),
sparse 31% (87347372032), duration 20599, 64/5 MB/s
102: Sep 11 21:02:26 INFO: status: 62% (170429382656/274877906944),
sparse 32% (89709514752), duration 20679, 34/4 MB/s
102: Sep 11 21:05:58 INFO: status: 63% (173173768192/274877906944),
sparse 33% (91583725568), duration 20891, 12/4 MB/s
102: Sep 11 21:14:23 INFO: status: 64% (176005578752/274877906944),
sparse 33% (92553965568), duration 21396, 5/3 MB/s
102: Sep 11 21:17:31 INFO: status: 65% (178677743616/274877906944),
sparse 34% (94386757632), duration 21584, 14/4 MB/s
102: Sep 11 21:20:54 INFO: status: 66% (181494087680/274877906944),
sparse 34% (96029155328), duration 21787, 13/5 MB/s
102: Sep 11 21:22:01 INFO: status: 67% (184174116864/274877906944),
sparse 35% (98381385728), duration 21854, 40/4 MB/s
102: Sep 11 21:23:04 INFO: status: 68% (186933706752/274877906944),
sparse 36% (100687675392), duration 21917, 43/7 MB/s
102: Sep 11 21:24:20 INFO: status: 69% (189712302080/274877906944),
sparse 37% (103065272320), duration 21993, 36/5 MB/s
102: Sep 11 21:24:56 INFO: status: 70% (192456687616/274877906944),
sparse 38% (105666965504), duration 22029, 76/3 MB/s
102: Sep 11 21:25:55 INFO: status: 71% (195204874240/274877906944),
sparse 39% (108165144576), duration 22088, 46/4 MB/s
102: Sep 11 21:27:43 INFO: status: 72% (197972066304/274877906944),
sparse 40% (110535868416), duration 22196, 25/3 MB/s
102: Sep 11 21:28:21 INFO: status: 73% (200815214592/274877906944),
sparse 41% (113191710720), duration 22234, 74/4 MB/s
102: Sep 11 21:29:00 INFO: status: 74% (203575197696/274877906944),
sparse 42% (115806048256), duration 22273, 70/3 MB/s
102: Sep 11 21:29:31 INFO: status: 75% (206357987328/274877906944),
sparse 43% (118478651392), duration 22304, 89/3 MB/s
102: Sep 11 21:29:57 INFO: status: 76% (209455153152/274877906944),
sparse 44% (121460871168), duration 22330, 119/4 MB/s
102: Sep 11 21:30:56 INFO: status: 77% (211876446208/274877906944),
sparse 44% (123596652544), duration 22389, 41/4 MB/s
102: Sep 11 21:34:14 INFO: status: 78% (214434578432/274877906944),
sparse 45% (125501145088), duration 22587, 12/3 MB/s
102: Sep 11 21:37:17 INFO: status: 79% (217327206400/274877906944),
sparse 46% (127840481280), duration 22770, 15/3 MB/s
102: Sep 11 21:45:32 INFO: status: 80% (219908145152/274877906944),
sparse 46% (128776359936), duration 23265, 5/3 MB/s
102: Sep 11 21:58:29 INFO: status: 81% (222656331776/274877906944),
sparse 46% (129068785664), duration 24042, 3/3 MB/s
102: Sep 11 22:08:01 INFO: status: 82% (225402814464/274877906944),
sparse 47% (129656516608), duration 24614, 4/3 MB/s
102: Sep 11 22:19:56 INFO: status: 83% (228190715904/274877906944),
sparse 47% (130116591616), duration 25329, 3/3 MB/s
102: Sep 11 22:30:18 INFO: status: 84% (230927499264/274877906944),
sparse 47% (130877239296), duration 25951, 4/3 MB/s
102: Sep 11 22:39:45 INFO: status: 85% (233665069056/274877906944),
sparse 48% (132014039040), duration 26518, 4/2 MB/s
102: Sep 11 22:41:25 INFO: status: 86% (236401524736/274877906944),
sparse 48% (134447341568), duration 26618, 27/3 MB/s
102: Sep 11 22:42:15 INFO: status: 87% (239346909184/274877906944),
sparse 49% (137205530624), duration 26668, 58/3 MB/s
102: Sep 11 22:44:24 INFO: status: 88% (241894686720/274877906944),
sparse 50% (139335483392), duration 26797, 19/3 MB/s
102: Sep 11 22:47:04 INFO: status: 89% (244822966272/274877906944),
sparse 51% (141699612672), duration 26957, 18/3 MB/s
102: Sep 11 22:50:05 INFO: status: 90% (247483662336/274877906944),
sparse 52% (143801442304), duration 27138, 14/3 MB/s
102: Sep 11 22:50:33 INFO: status: 91% (250639941632/274877906944),
sparse 53% (146862690304), duration 27166, 112/3 MB/s
102: Sep 11 22:51:21 INFO: status: 92% (253034627072/274877906944),
sparse 54% (149133193216), duration 27214, 49/2 MB/s
102: Sep 11 22:52:11 INFO: status: 93% (255862636544/274877906944),
sparse 55% (151776423936), duration 27264, 56/3 MB/s
102: Sep 11 22:52:43 INFO: status: 94% (258990931968/274877906944),
sparse 56% (154755170304), duration 27296, 97/4 MB/s
102: Sep 11 22:52:56 INFO: status: 95% (261225971712/274877906944),
sparse 57% (156905242624), duration 27309, 171/6 MB/s
102: Sep 11 22:53:22 INFO: status: 96% (264057782272/274877906944),
sparse 58% (159662522368), duration 27335, 108/2 MB/s
102: Sep 11 22:53:51 INFO: status: 97% (266977214464/274877906944),
sparse 59% (162483757056), duration 27364, 100/3 MB/s
102: Sep 11 22:54:09 INFO: status: 98% (269600227328/274877906944),
sparse 60% (165045428224), duration 27382, 145/3 MB/s
102: Sep 11 22:54:28 INFO: status: 99% (272154099712/274877906944),
sparse 60% (167531188224), duration 27401, 134/3 MB/s
102: Sep 11 22:55:10 INFO: status: 100% (274877906944/274877906944),
sparse 61% (170097410048), duration 27443, 64/3 MB/s
102: Sep 11 22:55:10 INFO: transferred 274877 MB in 27443 seconds (10 MB/s)
102: Sep 11 22:57:58 INFO: archive file size: 64.68GB
102: Sep 11 22:58:00 INFO: Finished Backup of VM 102 (07:40:14)