Re: RFT: updatedb "morning after" problem [was: Re: -mm merge plans for 2.6.23]

[Mike Galbraith <efault@gmx.de>]

On Thu, 2007-07-26 at 03:09 -0700, Andrew Morton wrote:

> Setting it to zero will maximise the preservation of the vfs caches.  You
> wanted 10000 there.
> 
> <bets that nobody will test this>

drops caches prior to both updatedb runs.

root@Homer: df -i
Filesystem            Inodes   IUsed   IFree IUse% Mounted on
/dev/hdc3            12500992 1043544 11457448    9% /
udev                  129162    1567  127595    2% /dev
/dev/hdc1              26104      87   26017    1% /boot
/dev/hda1             108144   90676   17468   84% /windows/C
/dev/hda5              11136    3389    7747   31% /windows/D
/dev/hda6                  0       0       0    -  /windows/E

vfs_cache_pressure=10000, updatedb freshly completed:
procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa
 1  0     48  76348 420356 104748    0    0     0     0 1137  912  3  1 97  0

ext3_inode_cache  315153 316274    524    7    1 : tunables   54   27    8 : slabdata  45182  45182      0
dentry_cache      224829 281358    136   29    1 : tunables  120   60    8 : slabdata   9702   9702      0
buffer_head       156624 159728     56   67    1 : tunables  120   60    8 : slabdata   2384   2384      0

vfs_cache_pressure=100 (stock), updatedb freshly completed:

procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu----
 r  b   swpd   free   buff  cache   si   so    bi    bo   in   cs us sy id wa
1  0    148  83824 270088 116340    0    0     0     0 1095  330  2  1 97  0
 
ext3_inode_cache  467257 502495    524    7    1 : tunables   54   27    8 : slabdata  71785  71785      0
dentry_cache      292695 408958    136   29    1 : tunables  120   60    8 : slabdata  14102  14102      0
buffer_head       118329 184384     56   67    1 : tunables  120   60    8 : slabdata   2752   2752      1

Note:  updatedb doesn't bother my box, not running enough leaky apps I
guess.

	-Mike

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