We are wondering if we are facing performance issue in our server when running Informatica jobs. Two things to suspect:
cache memory never comes down even when Top shows > 99% used.
There is some contention io or network related or Cache is clogged
If We kill all Informatica services & jobs... the utilization in Top comes down to
A) I am not sure why the cache memory is not released ?
B) Even when utilization in Top is going to 32 GB i.e. when Informatica jobs are running, Cache is still at 18GB ... Shouldn't cache be released because Informatica jobs are hanging ?
I strongly feel this is nothing to do with Server memory because I see swap memory not come into play at all but before I go to Informatica and raise a flag... I want to make sure there is nothing from server side... what more can I do to ensure that everything on server side works fine i.e. CPU & IO or Network, as I am not able to think of any other factor affecting this from server side?
Your bottleneck is IO. Compare between under load and normal load:
20.9%wa -> That's the percentage the CPU had to wait for IO. (Slow)
0.1%wa -> Normal load.
I am going to assume that this is a Linux kernel operating system based on how top looks; you did not say:
cached means memory not used and since it would be wasted, the kernel is using it for caching disk. At any time needed by any application use, it will be taken. You should not be concerned with it. You should considerate it free memory.
Hi,
would like to know the server status from the following 'top' out put. Because, the application is giving a bad performance. would like to know whether the load is within the acceptable limit.
Murali...
System: shpu28 Tue Feb 3 10:03:31... (4 Replies)
Hi All,
I would like to create a script that will monitor the server if it's heavy on the processing. I have already some scripts for monitoring disk capacity, application monitoring, etc but not on the bottleneck of the server processing.
I don't know which one to measure/query.
Can you... (2 Replies)
Ello group,
I have general question about how the performance of server/client should be?
My server is able to answer about 650times per second. Is it good performance?
the apache on the same machine makes 1600/sec BUT there is nine instances of httpd daemon what makes 180/ sec /instance.
of... (1 Reply)
Hi,
I am supposed to run few jobs based on the usage of unix server. How to find out if the server is too busy. what are the commands we can use to find out that.
Thanks (1 Reply)
Hi,
i would like to ask if it is possible to get the server load on a solaris machine, but i don't want something like uptime (load average), iostat and vmstat. I would like to get something in percentage like CPU load in %, Disk usage in %, Ram usage in %.
I want to collect this data and to... (3 Replies)
There is a big problem with the server (VPS based on OpenVZ, CentOS 5, 3GB RAM). The problem is the following. The first 15-20 minutes after starting the server is operating normally, the load average is less than or about 1.0, but then begins to increase sharply% wa, then hovers around 95-99%.... (2 Replies)
hi all,
My server box is slow running. I have provide some statistics below:
Where is the bottleneck on the server?
I guess the bottleneck is disk I/O?
bash-3.00# prstat -Z
PID USERNAME SIZE RSS STATE PRI NICE TIME CPU PROCESS/NLWP
29206 mobi1 334M 264M sleep ... (8 Replies)
Hi,
how can we define performance of a server (Windows or Unix or Linux) ?
If processes waiting for CPU (on queue) are usually more than 3 or 5 can we conclude that CPU is not enough for that usage ?
Thank you. (1 Reply)
Hi Guys,
I am running Oracle database on RHEL 2.6.18-164.el5, now I want to check and make sure that my server is performing optimally.
I check top:
top - 09:45:03 up 2 days, 15:22, 3 users, load average: 2.57, 2.85, 2.77
Tasks: 433 total, 3 running, 430 sleeping, 0 stopped, 0... (1 Reply)