Open johnmehr opened 3 years ago
Moved from FreeBSD Forums (please hide as off topic, if it doesn't help) …
2021-04-18
I wondered whether a simple ZFS cache device would help.
As far as I can tell: the effect, if any, is negligible.
First and second runs with the device online, third run offline:
root@mowa219-gjp4-8570p:~ # time gitup ports load: 1.71 cmd: gitup 11603 [zio->io_cv] 640.53r 3.63u 6.07s 0% 284624k mi_switch+0xc1 sleepq_timedwait+0x2f _cv_timedwait_sbt+0x107 zio_wait+0x2f9 dmu_buf_hold_array_by_dnode+0x29d dmu_read_uio_dnode+0x3a dmu_read_uio_dbuf+0x3b zfs_read+0x1da zfs_freebsd_read+0x44 VOP_READ_APV+0x1f vn_read+0x1ed vn_io_fault_doio+0x43 vn_io_fault1+0x15c vn_io_fault+0x1a4 dofileread+0x81 sys_read+0xbc amd64_syscall+0x10c fast_syscall_common+0xf8 # Host: git.freebsd.org # Port: 443 # Repository: /ports.git # Target: /usr/ports # Have: ce7525e65911cc709c94f07f6b64477e2e35f7a7 # Want: 72b4c9dd9b214e5c8785494ed92fc39568c15603 # Branch: main # Action: pull * /usr/ports/net/quiche/Makefile * /usr/ports/net/quiche/distinfo 7.803u 11.844s 20:17.92 1.6% 51+171k 144380+77637io 0pf+0w root@mowa219-gjp4-8570p:~ # time gitup ports # Host: git.freebsd.org # Port: 443 # Repository: /ports.git # Target: /usr/ports # Have: 72b4c9dd9b214e5c8785494ed92fc39568c15603 # Want: 168a3c4e3a51e4fe8e9ef0351c2b4e8008a97452 # Branch: main # Action: pull * /usr/ports/net-p2p/awgg/Makefile * /usr/ports/net-p2p/awgg/pkg-plist 8.349u 12.100s 21:16.81 1.6% 50+168k 144394+77637io 0pf+0w root@mowa219-gjp4-8570p:~ # time gitup ports # Host: git.freebsd.org # Port: 443 # Repository: /ports.git # Target: /usr/ports # Have: 168a3c4e3a51e4fe8e9ef0351c2b4e8008a97452 # Want: 1c8ce0fb8ad179fc5b346e3cd92fa61798404132 # Branch: main # Action: pull * /usr/ports/audio/praat/Makefile * /usr/ports/audio/praat/distinfo 7.610u 10.826s 22:03.44 1.3% 51+169k 144176+77637io 0pf+0w root@mowa219-gjp4-8570p:~ # zpool status copperbowl pool: copperbowl state: ONLINE scan: scrub repaired 0B in 01:40:58 with 0 errors on Thu Jan 7 02:36:19 2021 config: NAME STATE READ WRITE CKSUM copperbowl ONLINE 0 0 0 ada0p4.eli ONLINE 0 0 0 cache da1 ONLINE 0 0 0 errors: No known data errors root@mowa219-gjp4-8570p:~ # freebsd-version -kru 14.0-CURRENT 14.0-CURRENT 14.0-CURRENT root@mowa219-gjp4-8570p:~ #
Thank you for checking this out. I'll be circling back to disk performance after I get the memory footprint issues addressed. Thanks!
Moved from FreeBSD Forums (please hide as off topic, if it doesn't help) …
2021-04-18
I wondered whether a simple ZFS cache device would help.
As far as I can tell: the effect, if any, is negligible.
First and second runs with the device online, third run offline: