Tag Info

Hot answers tagged

7

The data in question does NOT need to be secure... prevent warning about mixing secure I think you should probably understand the reason for these warnings instead of just trying to ignore them as best as possible. If content on a secure site is included from a insecure site it might affect the security of the original site. The server takes on ...


4

Running a mailing list on a postfix server myself, I expect to see 2,000 messages get processed at least once (i.e. they might be deferred) before you can finish making a cup of coffee. Your system appears to be running spam and virus scans on outgoing mail. While it's a good idea to scan incoming mail, it's probably not so good an idea to scan outgoing ...


2

The CPU Wait Time Per Dispatch counter in either the Hyper-V Hypervisor Root Virtual Processor or the Hyper-V Hypervisor Virtual Processor counter sets means, quite simply: The average time (in nanoseconds) spent waiting for a virtual processor to be dispatched onto a logical processor. The answer of "what should it be?" entirely depends on the ...


2

Schedule downtime and reboot your VM. Memory hot-add isn't really that great. You may have other issues in your VMware environment like a hard memory limit assigned to the VM. Make sure that you don't have any.


2

You need to gather data at gateway level. If you have a firewall between your LAN and the internet routers, maybe it provide you with the ability to monitor different traffic types. As another possibly, you can put a routing or bridging Linux machine between your LAN and the routers and use a software like NTOP to monitor network traffic.


1

If this is a desktop system, this will likely get marked as off-topic and redirected to SuperUser - FYI. More hardware specifications would be needed to answer with any degree of certainty (what motherboard, which PCI slot the card is in, etc). However, that LSI card may well be the performance bottleneck. I would suggest you set up a single-drive RAID0 ...


1

I would rebuild the server from scratch using the same documentation that I have for production. or more likely I would get puppet to do it for me. If you don't have that documentation or automation, now is the perfect opportunity to look into doing it.


1

To calculate the percentage of performance lost, per CPU, perform the following: Take the collected value and divide by the number of units in the polling interval, then multiply by 100 to get the percent impact. For example, if the metric collected is 50 milliseconds, and the collection period is 20 seconds, divide 50ms by 20000ms, times 100%, and you get ...


1

You problem is I/O speed, as seen by the high CPU WAITING time. This can be due to two factor: postfix queue management is fsync()-rich and impose a heavy load on IOPS terms. Try this: remount the filesystem that hosts postfix's queue (typically the root filesystem) with the "-o nobarrier" mount option. WARNING: this should be considered a test only, as ...


1

If the points that I lay out in this answer are taken care of I would say PostgreSQL still performs reasonably well with Windows. Comparing to the year 2011 I don't see any major difference though. From my experience it's mostly about taking care that no Windows process gets in the way so this quote from the book PostgreSQL 9.0 High Performace (2010) still ...


1

The absolute fastest would be eNull. To include eNull in ssl_ciphers, try "aNULL:eNULL:MD5:LOW:HIGH" for you cipher string. Typically, however you are going to negotiate the highest supported cipher. You therefore may want to cap it by setting using !HIGH, but be sure to thoroughly test this. You will at least need to keep in LOW as I believe most browsers ...



Only top voted, non community-wiki answers of a minimum length are eligible