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| author | David Teigland <teigland@redhat.com> | 2022-02-21 11:35:58 -0600 |
|---|---|---|
| committer | David Teigland <teigland@redhat.com> | 2022-06-09 11:32:52 -0500 |
| commit | cdefd8635de24200b55822fa0b6bc23a638fb87a (patch) | |
| tree | c643397b0bf761e02c36a7ec4fa994fba5081660 | |
| parent | 08a5619a1d7a5a8dd6e0df6e4dedec47ce2533b7 (diff) | |
| download | lvm2-cdefd8635de24200b55822fa0b6bc23a638fb87a.tar.gz | |
man lvmcache: mention writecache memory usage
| -rw-r--r-- | man/lvmcache.7_main | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/man/lvmcache.7_main b/man/lvmcache.7_main index 48cf7b492..73680235b 100644 --- a/man/lvmcache.7_main +++ b/man/lvmcache.7_main @@ -240,6 +240,18 @@ The writecache block size should be chosen to match the xfs sectsz value. It is also possible to specify a sector size of 4096 to mkfs.xfs when creating the file system. In this case the writecache block size of 4096 can be used. +.P +.SS dm-writecache memory usage +.P +The amount of main system memory used by dm-writecache can be a factor +when selecting the writecache cachevol size and the writecache block size. +.P +.IP \[bu] 2 +writecache block size 4096: each 100 GiB of writecache cachevol uses +slighly over 2 GiB of system memory. +.IP \[bu] 2 +writecache block size 512: each 100 GiB of writecache cachevol uses +a little over 16 GiB of system memory. . .SS dm-writecache settings . |