Performance bottleneck identification in Nginx - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check the current active connections in NGINX.

Nginx

curl http://localhost/nginx_status | grep [1]

Drag options to blanks, or click blank then click option'

AActive

BConnections

CRequests

DStatus

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'Connections' alone does not match the exact line.

Using 'Requests' shows total requests, not active connections.

The Active keyword shows the number of active connections in the NGINX status output.

2fill in blank

medium

Complete the code to enable the stub_status module in NGINX configuration.

Nginx

location /nginx_status {
    stub_status [1];
    allow 127.0.0.1;
    deny all;
}

Drag options to blanks, or click blank then click option'

Aon

Boff

Cenable

Dtrue

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'off' disables the module.

Using 'enable' or 'true' are invalid directives.

The stub_status on; directive enables the status module in NGINX.

3fill in blank

hard

Fix the error in the NGINX log format to include request time.

Nginx

log_format main '$remote_addr - $remote_user [$time_local] "$request" '
                 '$status $body_bytes_sent "$http_referer" '
                 '"$http_user_agent" $[1]; 

Drag options to blanks, or click blank then click option'

Arequest_length_time

Brequest_time

Crequest_length

Drequest_duration

Attempts:

3 left

💡 Hint

Common Mistakes

Using '$request_duration' or '$request_length' are invalid variables.

Misspelling the variable causes logging errors.

The variable $request_time logs the time spent processing the request.

4fill in blank

hard

Fill both blanks to create a map that sets a variable based on request time threshold.

Nginx

map $request_time $slow_request {
    default [1];
    ~^[3-9]\.|^[1-9][0-9]+ [2];
}

Drag options to blanks, or click blank then click option'

A0

B1

Ctrue

Dfalse

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'true' or 'false' instead of numeric 0 or 1.

Reversing the default and matched values.

The map sets $slow_request to 0 by default and 1 if the request time is 3 seconds or more.

5fill in blank

hard

Fill all three blanks to log slow requests only.

Nginx

access_log /var/log/nginx/slow.log combined if=[1];

map $request_time $slow_request {
    default [2];
    ~^[3-9]\.|^[1-9][0-9]+ [3];
}

Drag options to blanks, or click blank then click option'

A$slow_request

B0

C1

D$request_time

Attempts:

3 left

💡 Hint

Common Mistakes

Using '$request_time' directly in access_log condition.

Mixing up default and matched values in the map.

The access log uses if=$slow_request to log only slow requests. The map sets default to 0 (not slow) and 1 for slow requests.