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This article mainly explains "the difference between centos and rhel performance". The content in the article is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "the difference between centos and rhel performance".

Seems to have discovered the mystery of the performance difference between centos and rhel, one of the key information can be seen in the identified memory, the details are as follows, although the version is different, make do with it.

It should be said that during the compilation process, rhel must have changed some parameters and made some performance tuning, so in comparison, rhel's performance will be better than centos's.

Rhel 6.3x64 memory information:

[root@localhost ~] # cat / proc/meminfo

MemTotal: 641656 kB

MemFree: 89576 kB

Buffers: 24124 kB

Cached: 238436 kB

SwapCached: 0 kB

Active: 131232 kB

Inactive: 292792 kB

Active (anon): 71952 kB

Inactive (anon): 92424 kB

Active (file): 59280 kB

Inactive (file): 200368 kB

Unevictable: 0 kB

Mlocked: 0 kB

SwapTotal: 1835000 kB

SwapFree: 1835000 kB

Dirty: 0 kB

Writeback: 0 kB

AnonPages: 161392 kB

Mapped: 61456 kB

Shmem: 2948 kB

Slab: 74436 kB

SReclaimable: 19328 kB

SUnreclaim: 55108 kB

KernelStack: 2208 kB

PageTables: 28016 kB

NFS_Unstable: 0 kB

Bounce: 0 kB

WritebackTmp: 0 kB

CommitLimit: 2155828 kB

Committed_AS: 553804 kB

VmallocTotal: 34359738367 kB

VmallocUsed: 24116 kB

VmallocChunk: 34359694324 kB

HardwareCorrupted: 0 kB

AnonHugePages: 45056 kB

HugePages_Total: 0

HugePages_Free: 0

HugePages_Rsvd: 0

HugePages_Surp: 0

Hugepagesize: 2048 kB

DirectMap4k: 8128 kB

DirectMap2M: 923648 kB

Centos 6.5x64 memory information

[root@localhost ~] # cat / proc/meminfo

MemTotal: 882968 kB

MemFree: 221896 kB

Buffers: 72548 kB

Cached: 172604 kB

SwapCached: 4248 kB

Active: 207404 kB

Inactive: 286880 kB

Active (anon): 97400 kB

Inactive (anon): 157904 kB

Active (file): 110004 kB

Inactive (file): 128976 kB

Unevictable: 0 kB

Mlocked: 0 kB

SwapTotal: 1675256 kB

SwapFree: 1649688 kB

Dirty: 52 kB

Writeback: 0 kB

AnonPages: 245544 kB

Mapped: 32704 kB

Shmem: 6172 kB

Slab: 117964 kB

SReclaimable: 56276 kB

SUnreclaim: 61688 kB

KernelStack: 2272 kB

PageTables: 28444 kB

NFS_Unstable: 0 kB

Bounce: 0 kB

WritebackTmp: 0 kB

CommitLimit: 2116740 kB

Committed_AS: 943316 kB

VmallocTotal: 34359738367 kB

VmallocUsed: 24084 kB

VmallocChunk: 34359697400 kB

HardwareCorrupted: 0 kB

AnonHugePages: 83968 kB

HugePages_Total: 0

HugePages_Free: 0

HugePages_Rsvd: 0

HugePages_Surp: 0

Hugepagesize: 2048 kB

DirectMap4k: 8128 kB

DirectMap2M: 903168 kB

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