Hi all,
now I'm using JFS on Gentoo linux (Kernel 2.6.19) box.
This box is really simple (no great cpu, no RAID) just for
testing. I'm curious about memory usage of JFS.
This box has 512 MB RAM and uses less than 20 MB ram before many
disk access, like find command for /usr/portage.
But after that, memory utilization has fairly increased.
In slabtop, jfs_ip seems using memory.
The portage directory has a lots of small files, its size is at most 10kb and
average file size is much more smaller than 10kb.
And number of files is over 120000.
<<before "find /usr/porage">>
$ free
total used free shared buffers cached
Mem: 491912 30536 461376 0 24 16076
-/+ buffers/cache: 14436 477476
Swap: 1004052 0 1004052
<<after "find /usr/portage">>
$ free
total used free shared buffers cached
Mem: 491912 348784 143128 0 24 159220
-/+ buffers/cache: 189540 302372
Swap: 1004052 0 1004052
$ cat /proc/slabinfo
slabinfo - version: 2.1
# name <active_objs> <num_objs> <objsize> <objperslab>
<pagesperslab> : tunables <limit> <batchcount> <sharedfactor> : slabdata
<active_slabs> <num_slabs> <sharedavail>
<<<snip>>>
jfs_mp 36275 36305 72 53 1 : tunables 120 60 8 :
slabdata 685 685 0
jfs_ip 151376 151376 876 4 1 : tunables 54 27 8 :
slabdata 37844 37844 0
udf_inode_cache 0 0 380 10 1 : tunables 54 27 8 :
slabdata 0 0 0
<<<snip>>>
JFS(jfs_ip) memory utilization is not small, I think.
Is this memory utilization is normal?
And memory utilization stays at the level, so I don't think memory
leaking, this is correct?
$ cat /proc/meminfo
MemTotal: 491912 kB
MemFree: 141732 kB
Buffers: 24 kB
Cached: 160136 kB
SwapCached: 0 kB
Active: 149048 kB
Inactive: 17432 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 491912 kB
LowFree: 141732 kB
SwapTotal: 1004052 kB
SwapFree: 1004052 kB
Dirty: 4 kB
Writeback: 0 kB
AnonPages: 6340 kB
Mapped: 5052 kB
Slab: 178424 kB
SReclaimable: 172260 kB
SUnreclaim: 6164 kB
PageTables: 292 kB
NFS_Unstable: 0 kB
Bounce: 0 kB
CommitLimit: 1250008 kB
Committed_AS: 57844 kB
VmallocTotal: 532472 kB
VmallocUsed: 6824 kB
VmallocChunk: 525060 kB
$ cat /proc/version
Linux version 2.6.19-gentoo-r5 ([EMAIL PROTECTED]) (gcc バージョン 4.1.1 (Gentoo
4.1.1)) #1 SMP Tue Mar 6 12:52:45 JST 2007
-------
nac.
[EMAIL PROTECTED]
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