05-14-2008
Performance issue in expect library on AIX 5.3
Hi All,
I am getting a performance issue in expect5.43.0 library on IBM AIX 5.3. When I have used exp_fexpectv call for pattern matching with the expect string, the execution latency of the call is approximately 200 ms. In that way, I am able to complete only 4 or 5 transactions per second using the expect library. Even when I bypassed this call and used a separate code to read the file pointer opened by exp_popen, the latency is not reduced.
When I am using expect 5.40.0 expect library on solaris 8, I am not facing this problem.
Do I have to use expect 5.40.0 library on AIX to resolve problem? Or Could this be because of any issue with the AIX 5.3 installation? Please suggest.
10 More Discussions You Might Find Interesting
1. AIX
We have a AIX v5.3 on a p5 system with a poor performing Ingres database.
We added one CPU to the system to see if this would help. Now there are two CPU's.
with sar and topas -P I see good results: CPU usage around 30%
with topas I only see good results in the process output screen, the... (1 Reply)
Discussion started by: rein
1 Replies
2. UNIX for Advanced & Expert Users
Hi,
on a linux server I have the following :
vmstat 2 10
procs memory swap io system cpu
r b w swpd free buff cache si so bi bo in cs us sy id
0 4 0 675236 39836 206060 1617660 3 3 3 6 8 7 1 1 ... (1 Reply)
Discussion started by: big123456
1 Replies
3. AIX
Is there is any way to increase the CPU utilization of a Embedded SQL program in AIX 5.3 .. for performance purpose. (0 Replies)
Discussion started by: Gyanendra Awast
0 Replies
4. UNIX for Advanced & Expert Users
In my C program i am using very large file(approx 400MB) to read parts of it frequently. But due to large file the performance of the program goes down very badly. It shows very high I/O usage and I/O wait time.
My question is, What are the ways to optimize or tune I/O on linux or how i can get... (10 Replies)
Discussion started by: mavens
10 Replies
5. Solaris
Hi Gurus,
I am beginner in solaris and want to know what are the things we need to check for performance monitoring on our solairs OS.
for DISK,CPU and MEMORY.
Also how we do ipforwarding in slaris
Many thanks for your help
Pradeep P (4 Replies)
Discussion started by: ppandey21
4 Replies
6. AIX
Gurus, i have process that runs 5 times a day.
it runs normally (takes about 1 hour) to complete in 3 runs
but it is takes about ( 3 hrs to complete) two times
So i need to figure out why it takes significanlty high time during
those 2 runs.
The process is a shell script that connect to... (2 Replies)
Discussion started by: mad_man12
2 Replies
7. AIX
Hi Guys,
This is the situation I am in. Provide your views and input where should I start?
I have one P7 test server and a p520 production server. the job is taking pretty long on the P7 test server when compared to the P5 production server. below is the full detail.
Informix... (5 Replies)
Discussion started by: ithinksgreen
5 Replies
8. UNIX for Dummies Questions & Answers
hi I am having a performance issue with the following requirement
i have to create a permutation and combination on a set of three files
such that each record in each file is picked and the output is redirected in
a specific format but it is taking around 70 odd hours to prepare a
combination... (7 Replies)
Discussion started by: mad_man12
7 Replies
9. AIX
Hi,
We have 2 lpars on p6 blade. One of the lpar is having 3 core cpu with 5gb memory running sybase as database. An EOD process takes 25 min. to complete.
Now we have an lpar on P7 server with entitled cpu capacity of 2 with 16 Gb memory and sybase as database. The EOD process which takes... (17 Replies)
Discussion started by: vjm
17 Replies
10. AIX
Hi
We have an AIX5.3 server with application which is written in C. We are facing server (lpar) hangs intermediately. If we open new telnet window prompts for user and takes hell of a time to authenticate, not only that if we run ps -aef then also it takes lot of time. surprisingly there is no... (2 Replies)
Discussion started by: powerAIX
2 Replies
LEARN ABOUT PHP
expect_expectl
EXPECT_EXPECTL(3) 1 EXPECT_EXPECTL(3)
expect_expectl - Waits until the output from a process matches one of the patterns, a specified time period has passed, or anEOFis seen
SYNOPSIS
int expect_expectl (resource $expect, array $cases, [array &$match])
DESCRIPTION
Waits until the output from a process matches one of the patterns, a specified time period has passed, or an EOF is seen.
If $match is provided, then it is filled with the result of search. The matched string can be found in $match[0]. The match substrings
(according to the parentheses) in the original pattern can be found in $match[1], $match[2], and so on, up to $match[9] (the limitation of
libexpect).
PARAMETERS
o $expect
- An Expect stream, previously opened with expect_popen(3).
o $cases
- An array of expect cases. Each expect case is an indexed array, as described in the following table:
Expect Case Array
+----------+--------------------------+---+---+---+
|Index Key | | | | |
| | | | | |
| | Value Type | | | |
| | | | | |
| | Description | | | |
| | | | | |
| | Is Mandatory | | | |
| | | | | |
| | Default Value | | | |
| | | | | |
+----------+--------------------------+---+---+---+
| 0 | | | | |
| | | | | |
| | string | | | |
| | | | | |
| | pattern, that will be | | | |
| | matched against the out- | | | |
| | put from the stream | | | |
| | | | | |
| | yes | | | |
| | | | | |
| | | | | |
| | T{ 1 | | | |
| | | | | |
| | mixed | | | |
| | | | | |
| | value, that will be | | | |
| | returned by this func- | | | |
| | tion, if the pattern | | | |
| | matches | | | |
| | | | | |
| | yes | | | |
| | | | | |
| | | | | |
| | T{ 2 | | | |
| | | | | |
| | integer | | | |
| | | | | |
| | pattern type, one of: | | | |
| | EXP_GLOB, EXP_EXACT or | | | |
| | EXP_REGEXP | | | |
| | | | | |
| | no | | | |
| | | | | |
| | | | | |
| | EXP_GLOB | | | |
| | | | | |
+----------+--------------------------+---+---+---+
RETURN VALUES
Returns value associated with the pattern that was matched.
On failure this function returns: EXP_EOF, EXP_TIMEOUT or EXP_FULLBUFFER
CHANGELOG
+--------+---------------------------------------------------+
|Version | |
| | |
| | Description |
| | |
+--------+---------------------------------------------------+
| 0.2.1 | |
| | |
| | Prior to version 0.2.1, in $match parameter a |
| | match string was returned, not an array of match |
| | substrings. |
| | |
+--------+---------------------------------------------------+
EXAMPLES
Example #1
expect_expectl(3) example
<?php
// Copies file from remote host:
ini_set("expect.timeout", 30);
$stream = fopen("expect://scp user@remotehost:/var/log/messages /home/user/messages.txt", "r");
$cases = array(
// array(pattern, value to return if pattern matched)
array("password:", "asked for password"),
array("yes/no)?", "asked for yes/no")
);
while (true) {
switch (expect_expectl($stream, $cases)) {
case "asked for password":
fwrite($stream, "my password
");
break;
case "asked for yes/no":
fwrite($stream, "yes
");
break;
case EXP_TIMEOUT:
case EXP_EOF:
break 2; // break both the switch statement and the while loop
default:
die "Error has occurred!";
}
}
fclose($stream);
?>
SEE ALSO
expect_popen(3).
PHP Documentation Group EXPECT_EXPECTL(3)