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I used to see memory degrading on Cisco UCS blades. But less see on HPE blades. I thought it maybe quality control problem of Cisco manufacture. Today I read two articles in Cisco website, it explains why we see memory degrading and how it works. I attached the articles below. Managing Correctable Memory Errors on…
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DBA team told me Oracle was running slow on a HPE server. I observed the CPU utilization was about 50% of overall capacity. Whenever Oracle database bumps up the system experienced slowness. Further digged into the issue, I see Oracle workload only ran on single physical processor, but the server has two processors. And the …
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Just a quick post. When virtual machine cannot get DHCP IP address the first thing you want to check is firewall. Whatever Windows firewall or physical firewall. You should make sure UDP port 67 and 68 are not blocked. Otherwise you will see the virtual machine gets 169.x.x.x IP address only. The two ports is…
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使用vSphere Client登录vCenter Server 6.0时可能会出现如下报错信息： Login to the query service failed. The server could not interpret the communication from the client. (The remote server returned an error: (500) Internal Server Error.) 这是因为在登录vSphere Client时勾选了”Use Windows session credentials“。试试取消它。 相关知识库链接：Searching the Inventory with the vSphere Client fails (2143566)
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You may see following problem if you login vCenter Server 6.0 by vSphere Client: Login to the query service failed. The server could not interpret the communication from the client. (The remote server returned an error: (500) Internal Server Error.) That’s because “Use Windows session credentials” checkbox is selected. Deselect it and give it a…
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Just a quick post. When virtual machine cannot get DHCP IP address the first thing you want to check is firewall. Whatever Windows firewall or physical firewall. You should make sure UDP port 67 and 68 are not blocked. Otherwise you will see the virtual machine gets 169.x.x.x IP address only. The two ports is…
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You may see ‘Adobe Flash Player Out of Date’ on Chrome when you open vSphere Web Client. Click the text Chrome will update Flash Player automatically. But in some cases it doesn’t work due to maybe your Chrome is controlled by company policy or internet problem to Adobe.com. I found an article to show how…
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Slight network latency may cause application problem on sensitive virtual machines. Even the network responding time is just 3 or 7 ms. There is a way to improve the stability of responding latency – Enable RSS on NIC. Network traffic is handled by single CPU core when RSS is disabled. Enable it will distribute the…
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If your company implemented firewall and blocked public NTP server, you may see installation of vRealize Operation Manager pending on ./install.sh on console. That’s because the installer tries to negotiate with NTP server www.iana.org. The firewall blocked the traffic. VMware TAM Manager Shan told me there are two options on firewall to block traffic: REJECT…
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The smartd service can leads to ESXi 6.0 or 6.5 hosts no responding due to out of memory. I see that issue on ESXi 6.0 U2 and U3 both. I would recommend stay on ESXi 5.5 U3 at this moment. We do see the issue persist even after stop smartd service. Check out VMware official…
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