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From Patrick Hunt <ph...@apache.org>
Subject Re: Java heap size for Zookeeper?
Date Wed, 30 May 2012 16:51:22 GMT
It's more dependent on your workload than anything. If you're storing
on order of hundreds of small znodes then 1gb is going to more then
fine.

Patrick

On Tue, May 29, 2012 at 10:36 PM, Something Something
<mailinglists19@gmail.com> wrote:
> The Administrator's guide (
> http://zookeeper.apache.org/doc/trunk/zookeeperAdmin.html#sc_zkMulitServerSetup)
> says this:  Set the Java heap size..... Be conservative - use a maximum
> heap size of 3GB for a 4GB machine.
>
> So if on the production box the output from cat /proc/meminfo is as given
> below, what would be recommended java heap size?
>
> MemTotal:     61657476 kB
> MemFree:      25867796 kB
> Buffers:        239928 kB
> Cached:       33076988 kB
> SwapCached:          0 kB
> Active:       15040672 kB
> Inactive:     19581768 kB
> HighTotal:           0 kB
> HighFree:            0 kB
> LowTotal:     61657476 kB
> LowFree:      25867796 kB
> SwapTotal:    10125304 kB
> SwapFree:     10124980 kB
> Dirty:             424 kB
> Writeback:           0 kB
> AnonPages:     1305620 kB
> Mapped:          33688 kB
> Slab:          1104288 kB
> PageTables:      10092 kB
> NFS_Unstable:        0 kB
> Bounce:              0 kB
> CommitLimit:  40954040 kB
> Committed_AS:  2629492 kB
> VmallocTotal: 34359738367 kB
> VmallocUsed:      5272 kB
> VmallocChunk: 34359733031 kB
> HugePages_Total:     0
> HugePages_Free:      0
> HugePages_Rsvd:      0
> Hugepagesize:     2048 kB

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