Output from commands:
linux:~ # systemd-analyze critical-chain
The time after the unit is active or started is printed after the "@" character.
The time the unit takes to start is printed after the "+" character.
graphical.target @1min 32.108s
└─display-manager.service @1min 31.398s +710ms
└─systemd-user-sessions.service @1min 31.316s +61ms
└─basic.target @1min 31.293s
└─timers.target @1min 31.292s
└─systemd-tmpfiles-clean.timer @1min 31.292s
└─sysinit.target @1min 31.292s
└─systemd-update-utmp.service @11.127s +440ms
└─auditd.service @11.120s +5ms
└─systemd-tmpfiles-setup.service @10.814s +302ms
└─local-fs.target @10.808s
└─boot-grub2-i386\x2dpc.mount @10.774s +23ms
└─local-fs-pre.target @9.979s
└─systemd-remount-fs.service @1.770s +8.205s
└─systemd-readahead-replay.service @1.245s +480ms
└─system.slice
└─-.slice
linux:~ # man journalctl
linux:~ # journalctl -a | grep flushing
Dec 15 18:06:16 linux systemd-journal[1723]: Time spent on flushing to /var is 15.321ms for 811 entries.
Dec 15 18:47:26 linux systemd-journal[339]: Time spent on flushing to /var is 35.498ms for 803 entries.
Dec 15 18:56:45 linux systemd-journal[333]: Time spent on flushing to /var is 763.305ms for 797 entries.
Dec 15 19:19:13 linux systemd-journal[336]: Time spent on flushing to /var is 899.960ms for 786 entries.
Dec 15 20:04:23 linux systemd-journal[330]: Time spent on flushing to /var is 18.436ms for 798 entries.
Dec 15 20:27:51 linux systemd-journal[335]: Time spent on flushing to /var is 917.428ms for 805 entries.
Dec 17 19:20:39 linux systemd-journal[338]: Time spent on flushing to /var is 3.127492s for 814 entries.
Dec 17 20:01:26 linux systemd-journal[340]: Time spent on flushing to /var is 3.998405s for 816 entries.
Dec 17 20:29:02 linux systemd-journal[339]: Time spent on flushing to /var is 3.162114s for 815 entries.
Dec 17 20:49:19 linux systemd-journal[339]: Time spent on flushing to /var is 6.833561s for 820 entries.
linux:~ # journalctl -a | grep journal
Dec 15 18:06:13 linux systemd-journal[1723]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.6G available → current limit 393.8M).
Dec 15 18:06:13 linux systemd-journal[1723]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.6G available → current limit 393.8M).
Dec 15 18:06:13 linux systemd-journal[1723]: Journal started
Dec 15 18:06:16 linux systemd-journal[1723]: Permanent journal is using 9.0M (max allowed 309.4M, trying to leave 464.1M free of 2.6G available → current limit 309.4M).
Dec 15 18:06:16 linux systemd-journal[1723]: Time spent on flushing to /var is 15.321ms for 811 entries.
Dec 15 18:47:19 linux systemd-journal[112]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 15 18:47:19 linux systemd-journal[112]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 15 18:47:20 linux systemd-journal[112]: Journal started
Dec 15 18:47:20 linux systemd-journal[112]: Journal stopped
Dec 15 18:47:25 linux systemd-journal[339]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 15 18:47:25 linux systemd-journal[339]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 15 18:47:25 linux systemd-journal[339]: Journal started
Dec 15 18:47:26 linux systemd-journal[339]: Permanent journal is using 16.0M (max allowed 4.0G, trying to leave 4.0G free of 139.8G available → current limit 4.0G).
Dec 15 18:47:26 linux systemd-journal[339]: Time spent on flushing to /var is 35.498ms for 803 entries.
Dec 15 18:56:17 linux.site systemd-journal[339]: Journal stopped
Dec 15 18:56:36 linux systemd-journal[112]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 15 18:56:36 linux systemd-journal[112]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 15 18:56:37 linux systemd-journal[112]: Journal started
Dec 15 18:56:37 linux systemd-journal[112]: Journal stopped
Dec 15 18:56:40 linux systemd-journal[333]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 15 18:56:40 linux systemd-journal[333]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 15 18:56:40 linux systemd-journal[333]: Journal started
Dec 15 18:56:44 linux systemd-journal[333]: Permanent journal is using 24.0M (max allowed 4.0G, trying to leave 4.0G free of 139.8G available → current limit 4.0G).
Dec 15 18:56:45 linux systemd-journal[333]: Time spent on flushing to /var is 763.305ms for 797 entries.
Dec 15 19:18:46 linux.site systemd-journal[333]: Journal stopped
Dec 15 19:19:05 linux systemd-journal[111]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 15 19:19:05 linux systemd-journal[111]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 15 19:19:05 linux systemd-journal[111]: Journal started
Dec 15 19:19:06 linux systemd-journal[111]: Journal stopped
Dec 15 19:19:09 linux systemd-journal[336]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 15 19:19:09 linux systemd-journal[336]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 15 19:19:09 linux systemd-journal[336]: Journal started
Dec 15 19:19:12 linux systemd-journal[336]: Permanent journal is using 32.0M (max allowed 4.0G, trying to leave 4.0G free of 139.7G available → current limit 4.0G).
Dec 15 19:19:13 linux systemd-journal[336]: Time spent on flushing to /var is 899.960ms for 786 entries.
Dec 15 20:04:13 linux systemd-journal[111]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 15 20:04:13 linux systemd-journal[111]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 15 20:04:13 linux systemd-journal[111]: Journal started
Dec 15 20:04:14 linux systemd-journal[111]: Journal stopped
Dec 15 20:04:17 linux systemd-journal[330]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 15 20:04:17 linux systemd-journal[330]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 15 20:04:17 linux systemd-journal[330]: Journal started
Dec 15 20:04:23 linux systemd-journal[330]: Permanent journal is using 43.5M (max allowed 4.0G, trying to leave 4.0G free of 139.7G available → current limit 4.0G).
Dec 15 20:04:23 linux systemd-journal[330]: Time spent on flushing to /var is 18.436ms for 798 entries.
Dec 15 20:27:23 linux.site systemd-journal[330]: Journal stopped
Dec 15 20:27:41 linux systemd-journal[111]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 15 20:27:41 linux systemd-journal[111]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 15 20:27:42 linux systemd-journal[111]: Journal started
Dec 15 20:27:42 linux systemd-journal[111]: Journal stopped
Dec 15 20:27:45 linux systemd-journal[335]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 15 20:27:45 linux systemd-journal[335]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 15 20:27:45 linux systemd-journal[335]: Journal started
Dec 15 20:27:50 linux systemd-journal[335]: Permanent journal is using 40.0M (max allowed 4.0G, trying to leave 4.0G free of 137.9G available → current limit 4.0G).
Dec 15 20:27:51 linux systemd-journal[335]: Time spent on flushing to /var is 917.428ms for 805 entries.
Dec 15 22:32:12 linux.site systemd-journal[335]: Journal stopped
Dec 17 19:20:25 linux systemd-journal[112]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 17 19:20:25 linux systemd-journal[112]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 17 19:20:25 linux systemd-journal[112]: Journal started
Dec 17 19:20:26 linux systemd-journal[112]: Journal stopped
Dec 17 19:20:29 linux systemd-journal[338]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 17 19:20:29 linux systemd-journal[338]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 17 19:20:29 linux systemd-journal[338]: Journal started
Dec 17 19:20:36 linux systemd-journal[338]: Permanent journal is using 40.0M (max allowed 4.0G, trying to leave 4.0G free of 137.8G available → current limit 4.0G).
Dec 17 19:20:39 linux systemd-journal[338]: Time spent on flushing to /var is 3.127492s for 814 entries.
Dec 17 20:00:24 linux.site systemd-journal[338]: Journal stopped
Dec 17 20:01:12 linux systemd-journal[111]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 17 20:01:12 linux systemd-journal[111]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 17 20:01:12 linux systemd-journal[111]: Journal started
Dec 17 20:01:13 linux systemd-journal[111]: Journal stopped
Dec 17 20:01:15 linux systemd-journal[340]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 17 20:01:15 linux systemd-journal[340]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 17 20:01:15 linux systemd-journal[340]: Journal started
Dec 17 20:01:22 linux systemd-journal[340]: Permanent journal is using 40.0M (max allowed 4.0G, trying to leave 4.0G free of 137.4G available → current limit 4.0G).
Dec 17 20:01:26 linux systemd-journal[340]: Time spent on flushing to /var is 3.998405s for 816 entries.
Dec 17 20:28:16 linux.site systemd-journal[340]: Journal stopped
Dec 17 20:28:34 linux systemd-journal[111]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 17 20:28:34 linux systemd-journal[111]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 17 20:28:34 linux systemd-journal[111]: Journal started
Dec 17 20:28:35 linux systemd-journal[111]: Journal stopped
Dec 17 20:28:40 linux systemd-journal[339]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 17 20:28:40 linux systemd-journal[339]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 17 20:28:40 linux systemd-journal[339]: Journal started
Dec 17 20:28:59 linux systemd-journal[339]: Permanent journal is using 48.0M (max allowed 4.0G, trying to leave 4.0G free of 137.4G available → current limit 4.0G).
Dec 17 20:29:02 linux systemd-journal[339]: Time spent on flushing to /var is 3.162114s for 815 entries.
Dec 17 20:48:37 linux.site systemd-journal[339]: Journal stopped
Dec 17 20:48:56 linux systemd-journal[111]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 17 20:48:56 linux systemd-journal[111]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 17 20:48:56 linux systemd-journal[111]: Journal started
Dec 17 20:48:57 linux systemd-journal[111]: Journal stopped
Dec 17 20:48:59 linux systemd-journal[339]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 17 20:48:59 linux systemd-journal[339]: Runtime journal is using 8.0M (max allowed 393.8M, trying to leave 590.7M free of 3.8G available → current limit 393.8M).
Dec 17 20:48:59 linux systemd-journal[339]: Journal started
Dec 17 20:49:12 linux systemd-journal[339]: Permanent journal is using 48.0M (max allowed 4.0G, trying to leave 4.0G free of 137.3G available → current limit 4.0G).
Dec 17 20:49:19 linux systemd-journal[339]: Time spent on flushing to /var is 6.833561s for 820 entries.
I read the thread you link to - thank you for the help so far.