st3fan 6 Posted December 15, 2021 Share Posted December 15, 2021 Hi everyone Once again we are experiencing slow network performance with ESET. We are seeing what has been described here (https://forum.eset.com/topic/22793-efs-network-performance-issues). Summarized, when we copy files (e.g. an ISO image) from any Windows Server 2012R2/2016 machine (most recent updates installed) to pretty much anything on the network (e.g. a NAS device), we get around 100 MB/s on a 10 Gbps Ethernet link. If ESS is uninstalled we see around 700 MB/s. We had the exact same issue last year. After countless tests and extensive troubleshooting with support, we upgraded to version 7.1.12010.0 back then. This kind of resolved the issue at the time, and we got around 500 MB/s instead of 700 MB/s - not perfect but much better than 100 MB/s. Many months ago we updated to version 7.2.12004.2 and to be honest, we kind of forgot about this issue. Lately we have noticed a lot of performance related issues and started troubleshooting again. And it turns out that ESS is once again the culprit. The ESS policy has not changed since the last time we experienced this problem. In fact, we added more exclusions. Despite all of this, we once again only get a fraction of the available network speed if ESS is installed. We immediately upgraded ESS to the most recent version (8.0.12003.0) yesterday, after we identified the root cause, but this has not made a difference. We are still troubleshooting and are doing lots of tests but there is no doubt that ESS is causing this. Is anyone else experiencing this? I would appreciate your feedback and would be grateful for any advice. Thanks a lot. Link to comment Share on other sites More sharing options...
ESET Moderators Peter Randziak 1,130 Posted December 21, 2021 ESET Moderators Share Posted December 21, 2021 Hello @st3fan, what are the current speeds with the latest ESET Server Security? (latest one is 8.0.12010.0) Does the network slow-down start immediately after ESET Server Security installation or starts after the server reboot? Enabling Receive Side Coalescing (RSC) might resolve the issue, please try it as a first step. As a second step I would advise to enable Receive Side Scaling (RSS) Note: Having Maximum Numbers of RSS Queues and Maximum Numbers of RSS Processors not configured or set to 0 effectively disables RSS, despite having Receive Side Scaling set to Enabled. All three need to be set. Let us know, if enabling of them helped i.e. how the speed changed. If there won't be a noticeable difference, provide us with output from powershell Get-NetAdapterRsc Peter (M_EPFW-225 / P_EFSW-1255) Link to comment Share on other sites More sharing options...
st3fan 6 Posted January 25, 2022 Author Share Posted January 25, 2022 Thanks for your comments @Peter Randziak and apologies for my late reply. We have upgraded a few servers to 8.0.12010.0 in the interim - unfortunately things have not improved. We will run a few tests so that we can answer your questions. I have asked the server owners to check regarding RSC and RSS. Link to comment Share on other sites More sharing options...
ESET Moderators Peter Randziak 1,130 Posted January 25, 2022 ESET Moderators Share Posted January 25, 2022 Hello @st3fan, not an issue, thank you for the update. If the steps above won't help let's rise it as a ticket to be investigated. Please keep us posted. Peter Link to comment Share on other sites More sharing options...
st3fan 6 Posted January 28, 2022 Author Share Posted January 28, 2022 Hello @Peter Randziak RSS and RSC has not made a difference for us unfortunately. My colleague has opened a ticket with Support. I will keep you posted. Link to comment Share on other sites More sharing options...
Administrators Marcos 5,074 Posted January 28, 2022 Administrators Share Posted January 28, 2022 Does disabling either or both settings below make a difference? If not, does installing ESSW in custom mode without network protection do? Link to comment Share on other sites More sharing options...
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