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Top Forums UNIX for Advanced & Expert Users Performance Bottleneck in server, Need help Post 302992434 by smart_guy471 on Friday 24th of February 2017 04:18:45 PM
Old 02-24-2017
Wrench Performance Bottleneck in server, Need help

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
Code:
top - 20:58:20 up 16 days,  4:37, 16 users,  load average: 7.50, 4.85, 3.82
Tasks: 386 total,   2 running, 376 sleeping,   7 stopped,   1 zombie
Cpu(s): 35.1%us, 10.1%sy,  0.0%ni, 32.5%id, 20.9%wa,  0.0%hi,  1.3%si,  0.2%st
Mem:  32877500k total, 32626692k used,   250808k free,   291804k buffers
Swap: 20971516k total,    37056k used, 20934460k free, 18906004k cached

Code:
free -g
             total       used       free     shared    buffers     cached
Mem:            31         31          0          0          0         18
-/+ buffers/cache:         12         18
Swap:           19          0         19


If We kill all Informatica services & jobs... the utilization in Top comes down to

Code:
top - 20:16:17 up 16 days,  3:55, 18 users,  load average: 1.26, 0.94, 0.85
Tasks: 366 total,   1 running, 357 sleeping,   7 stopped,   1 zombie
Cpu(s):  8.0%us,  3.9%sy,  0.0%ni, 88.0%id,  0.1%wa,  0.0%hi,  0.0%si,  0.0%st
Mem:  32877500k total, 19378856k used, 13498644k free,   225320k buffers
Swap: 20971516k total,    37060k used, 20934456k free, 18426624k cached


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?
 

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IRSEND(1)							   User Commands							 IRSEND(1)

NAME
irsend - basic LIRC program to send infra-red commands SYNOPSIS
irsend [options] DIRECTIVE REMOTE CODE [CODE...] DESCRIPTION
Asks the lircd daemon to send one or more CIR (Consumer Infra-Red) commands. This is intended for remote control of electronic devices such as TV boxes, HiFi sets, etc. DIRECTIVE can be: SEND_ONCE - send CODE [CODE ...] once SEND_START - start repeating CODE SEND_STOP - stop repeating CODE LIST - list configured remote items SET_TRANSMITTERS - set transmitters NUM [NUM ...] SIMULATE - simulate IR event REMOTE is the name of a remote, as described in the lircd configuration file. CODE is the name of a remote control key of REMOTE, as it appears in the lircd configuration file. NUM is the transmitter number of the hardware device. For the LIST DIRECTIVE, REMOTE and/or CODE can be empty: LIST "" "" - list all configured remote names LIST REMOTE "" - list all codes of REMOTE LIST REMOTE CODE - list only CODE of REMOTE The SIMULATE command only works if it has been explicitly enabled in lircd. -h --help display usage summary -v --version display version -d --device use given lircd socket [/var/run/lirc/lircd] -a --address=host[:port] connect to lircd at this address -# --count=n send command n times EXAMPLES
irsend LIST DenonTuner "" irsend SEND_ONCE DenonTuner PROG-SCAN irsend SEND_ONCE OnkyoAmpli VOL-UP VOL-UP VOL-UP VOL-UP irsend SEND_START OnkyoAmpli VOL-DOWN ; sleep 3 irsend SEND_STOP OnkyoAmpli VOL-DOWN irsend SET_TRANSMITTERS 1 irsend SET_TRANSMITTERS 1 3 4 irsend SIMULATE "0000000000000476 00 OK TECHNISAT_ST3004S" FILES
/etc/lirc/lircd.conf Default lircd configuration file. It should contain all the remotes, their infra-red codes and the corresponding timing and wave- form details. DIAGNOSTICS
If lircd is not running (or /var/run/lirc/lircd lacks write permissions) irsend aborts with the following diagnostics: "irsend: could not connect to socket" "irsend: Connection refused" (or "Permission denied"). SEE ALSO
The documentation for lirc is maintained as html pages. They are located under html/ in the documentation directory. lircd(8), mode2(1), smode2(1), xmode2(1), irrecord(1), irw(1), http://www.lirc.org. irsend 0.9.0-pre1 October 2010 IRSEND(1)
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