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Re: CLOG contention
On Thu, Jan 5, 2012 at 2:44 PM, Kevin Grittner <Kevin(dot)Grittner(at)wicourts(dot)gov> wrote: > If we go with such a formula, I think 32 MB would be a more > appropriate divisor than 128 MB. Even on very large machines where > 32 CLOG buffers would be a clear win, we often can't go above 1 or 2 > GB of shared_buffers without hitting latency spikes due to overrun > of the RAID controller cache. (Now, that may change if we get DW > in, but that's not there yet.) 1 GB / 32 is 32 MB. This would > leave CLOG pinned at the minimum of 8 buffers (64 KB) all the way up > to shared_buffers of 256 MB. That seems reasonable to me. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company
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- Re: CLOG contention at 2012-01-05 19:44:50 from Kevin Grittner
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- Re: CLOG contention at 2012-01-05 20:45:26 from Merlin Moncure
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