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# citrix-netscalers
Slackbot
03/19/2020, 6:11 PMThis message was deleted.
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Julien Destombes
03/19/2020, 6:13 PMNot for CPU packet https://support.citrix.com/article/CTX139485
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Leee Jeffries
03/19/2020, 6:17 PMNope, you'll see no benefit. Salim, what's the issue?
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Salim Hurjuk
03/19/2020, 6:19 PMCPU utilization high
Salim Hurjuk
03/19/2020, 6:20 PMQ: Will adding CPU cores to a single NetScaler VPX instance increase the performance of that instance?
A: Depending on the license, a NetScaler VPX instance can use up to 4 vCPU today. Adding additional CPU to a NetScaler VPX instance that can use more CPUs will increase the performance.
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Julien Destombes
03/19/2020, 6:22 PMDo you apply CPU yield recommendations ?
Julien Destombes
03/19/2020, 6:23 PMl
Leee Jeffries
03/19/2020, 6:23 PMManagement CPU or the Packet engine?
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Salim Hurjuk
03/19/2020, 6:27 PMMgmt
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Leee Jeffries
03/19/2020, 6:27 PMDo you have AppFlow enabled?
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Salim Hurjuk
03/19/2020, 6:27 PMlet me check
Salim Hurjuk
03/19/2020, 6:27 PMsomeone else was managing that NS
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Leee Jeffries
03/19/2020, 6:29 PMThat'll kill the management cpu, if your having issues with the packet flow switch your ssl cipher group down to default. You will squeeze a few more session out of it.
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CTXMike
03/19/2020, 8:41 PMThe Q+A that was posted above is misleading. As mentioned earlier, even if you assign more than 2 cores to a VPX with a 200Mbit license, it will still only use one core for management and one core for a single packet engine. Julien's link has the correct breakdown of perpetual license and max packet engines supported
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