search for: bottleneck

Hi I must to estimate the* performance. I am try to understand which can be the eventual bottlenecks. Have you some suggestion? Can you to signal to me some problems? Thanks Alessandra

Samba bottlenecks? As my network grows I'll probably find Samba bottlenecks sooner or later - such as saturated bandwidth, internal I/O, bloated user database. Are there any signs to read foretelling the apocalypse? Are the any viable solutions? -- J?rgen Persson

...nodes to one rsync server over wan. I'm aware of the fact that on big directory tree rsync will consume a lot of memory and some time even hang. Do you have any estimation on how many rsync client can work with one server at the same time ? I can control each client bandwidth. What will be the bottleneck on the server resource ? Is there any role of thumb. My server running Linux 1Gh Pentium cpu and 512 Mb memory. Please share your experience. Thanks Dib Urim

...tings in smb.conf: server min protocol = SMB3_11 client min protocol = SMB3_11 strict sync = no The issue is that ZFS cannot even do sync writes with this dataset. Every single write is async. But when writing to the Samba share, these speeds do not translate. This might just be the SMB protocol bottleneck - but I'm not sure. If anybody wants to run the same fio tests I did with an async-only pool, it would be interesting to see if it indeed is an SMB bottleneck, or if I'm missing settings in smb.conf. ??????? Original Message ??????? On Thursday, July 25, 2019 2:50 PM, David Disseldorp v...

hello *, im running into two major bottlenecks an R script. 1. going through a 40mb file and reading in via readLines() 1 line at a time is almost an order of magnitude slow than the equivalent in python, im wondering if there are alternatives to readLines(), doing more lines at a time helps a bit 2. generating date sequences takes a long ti...

...alize that this question must have been asked before, I sroogled and found some posts on the web on how to tweak/tune gluster, however.. What I hope is that some experts and/or devel could write a bit more, maybe compose a doc on - How to investigate and trouble gluster's speed-performance bottleneck. Why I think such a thorough guide would be important? Well.. I guess many of us wonder when we look at how "raw" fs vs glusterfs does then we wonder - how come!? I know such a comparison is oversimplification or maybe even unfair but when I see such a gigantic performance difference...

...tly) schedule() too frequently 2 there's something in my system which makes the game wait in some sort of I/O which them implies both the CPU and GPU speed get reduced because the process spends a lot of time doing...nothing... just wait for that something. How would you recommend to find such bottleneck? Do you reckon is possible? Thanks in advance, Cheers, Ema! :-)

...he central Domain to process the SID to uid/gid mappings. Picture of the situation: Central PDC (smbd) <--- TCP --- department PDC (winbind) <-- (1..n) smbd <-- 1..n Workstations / Logons The TCP connection between the central PDC and the department PDC (winbindd) seems to be still a bottleneck. Is this right? What can I do? Any help or comment on this issue is very very welcome! However I have this problem since a long time and I actually use a samba version where I patched out all SID/gid mappings via winbind. This bad hack speeds up everything so that up to about 40 concurrent logins...

...t; > I've ruled out the network being an issue since a) they're hosted on the same host via a Linux bridge (which means it never leaves the box) and b)an iperf3 test with a single thread completed the benchmark at 44Gbit/s. > > > I guess that leaves one question: where is the bottleneck here, and is there perhaps another method to speed up these small writes for the sake of experimentation? You're still using direct I/O with fio, which will likely disallow client side caching with oplocks/leases. I'd recommend checking that your (cifs.ko?) client is using a relatively mod...

We have a few dovecot servers all pointing to the same mail location (an NFS mount on a NAS drive). This could lead to a possible bottleneck eventually and we were wondering if it's possible to have dovecot direct x number of users to one message store location while others get their mail on a different mount?

...n come close to this even at low resolution and overclocked, and I have the 512Mb version of this card, this guy has the 256mb version and I have the same settings, i've seen people run some really high-end games on this like crysis at decent settings, (not high just decent). Does wine actually bottleneck performance on modern games? I have native windows directx9 installed, does this reduce performance or the other way round?. Also, I plan to test it out in windows to see if I get any better performance, if I run XP in virtual box would I be able to run games? I don't particularly feel like fo...

Dtrace and Performance Teams, I have the following IO Performance Specific Questions (and I''m already savy with the lockstat and pre-dtrace utilities for performance analysis.. but in need of details regarding specifying IO bottlenecks @ the controller or IO bus..) : **Q.A*> Determining IO Saturation bottlenecks ( */.. beyond service times and kernel contention.. )/ I''m trying to quantify the /*% of resources consumed on the IO side*/ of things. For the cpu, memory, kernel, etc.. I can see where there is contenti...

Hi Everyone, I have a Dell R210 server which has a Xeon X3430 Quad Core CPU (2.4Ghz x 4) with 8GB of RAM. I intend to use the H200 controller in a RAID1 setup How many VMs do you think I''d be able to run on this machine? Is 20 pushing it? I''d say most (if not all) guests would be in PV mode. Thanks _______________________________________________ Xen-users mailing list

...the sync / direct parameters. If you want Samba to ignore SMB client sync requests, then you could set "strict sync = no", but like the sync=disabled ZFS tunable you mentioned, this parameter plays russian roulette with your data if the server goes down unexpectedly. > 2) Where is the bottleneck exactly? > > I currently have this setup in my smb.conf, just listing the lines I edited (the rest is default): > > [global] > netbios name = prox > case sensitive = no > server min protocol = SMB3 > client min protocol = SMB3 > > [Media] > path = /zfs/synctest &...

...Phone everywhere there is an existing computer workstation - using the same LAN for phones and computers. The layout involves workstations connected to two switches (the unmanaged 'dumb' type) and the switches linked to each other by a buried cable. This link between the switches is a bottleneck - large file transfers through the link are common enough that a disruption to VoIP traffic is pretty much guaranteed. I'm convinced that a QoS-based approach is the way to ensure file transfers do not interrupt VoIP traffic. (not to mention the fact that I don't want to have to dig a...

...nore the absolute value for the moment). If I run the same test, but this time from inside dom0, I get a per flow throughput of around 6Mbps. I''m trying to understand the difference in performance. It seems to me that the I/O descriptor ring sizes are hard coded to 256 -- could that be a bottleneck here? If not, have people experience similar problems? TIA -- Diwaker Gupta http://resolute.ucsd.edu/diwaker ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Disco...

...results. Here's my setup: Fast new WinXP Pro machine NetGear GA311 gigabit ethernet ^ | dedicated gigabit ethernet line (no switch) v RTL8169 gigabit ethernet Relatively fast new Debian Linux machine I set up ramdisks on both machines to ensure that the hard drives were not the bottleneck. I then put a roughly 7 MB file on the linux ramdisk and mounted that disk on my windows box via Samba. I then wrote a .bat script on the windows side that copies the file from the linux ramdisk to the windows ramdisk over and over again. On the windows side, the network utilization monitor s...

...; +Reid, who's responsible for the windows/CodeView/PDB debug info which is motivating some of the ideas about changes to type emission > > So how does this relate, or not, to Peter's (pcc) work trying to reduce the DIE overhead during code gen? Are you folks chasing different memory bottlenecks? Are they both relevant (perhaps in different scenarios)? I think this is orthogonal to Peter's work, although (2) may help DIE overhead, I'm not sure. The primary goal is actually CPU speedup when lazy-loading only a very small number of functions from a module (e.g, a module that gets...

Hello. I've been seting up a small VoIP setup, with roughly 5 persons, doing essentially some Meetme conferences. People have been experiencing some quality problems with the sound. Essentially delay, and some tolerable echo. I'd appreciate advice on how to troubleshoot this issue. What could be the most common reasons behind this? Please feel free to ask for more relevant details.

...39;s responsible for the windows/CodeView/PDB debug info which is > motivating some of the ideas about changes to type emission > > So how does this relate, or not, to Peter's (pcc) work trying to reduce > the DIE overhead during code gen? Are you folks chasing different memory > bottlenecks? Are they both relevant (perhaps in different scenarios)? > > > I think this is orthogonal to Peter's work, although (2) may help DIE > overhead, I'm not sure. The primary goal is actually CPU speedup when > lazy-loading only a very small number of functions from a module (...