Mercurial > hg > nginx-site
view xml/en/docs/http/ngx_http_status_module.xml @ 2223:a692df6ef304
Added upstream keepalive_timeout and keepalive_requests.
author | Yaroslav Zhuravlev <yar@nginx.com> |
---|---|
date | Wed, 22 Aug 2018 12:44:26 +0300 |
parents | 5c55b7054b58 |
children | 283b1e67eaa6 |
line wrap: on
line source
<?xml version="1.0"?> <!-- Copyright (C) Nginx, Inc. --> <!DOCTYPE module SYSTEM "../../../../dtd/module.dtd"> <module name="Module ngx_http_status_module" link="/en/docs/http/ngx_http_status_module.html" lang="en" rev="17"> <section id="summary"> <para> The <literal>ngx_http_status_module</literal> module provides access to various status information. <note> This module was superseded by the <link doc="ngx_http_api_module.xml">ngx_http_api_module</link> module in 1.13.0. </note> </para> <para> <note> This module is available as part of our <commercial_version>commercial subscription</commercial_version>. </note> </para> </section> <section id="example" name="Example Configuration"> <para> <example> http { upstream <emphasis>backend</emphasis> { <emphasis>zone</emphasis> http_backend 64k; server backend1.example.com weight=5; server backend2.example.com; } proxy_cache_path /data/nginx/cache_backend keys_zone=<emphasis>cache_backend</emphasis>:10m; server { server_name backend.example.com; location / { proxy_pass http://backend; proxy_cache cache_backend; health_check; } <emphasis>status_zone server_backend;</emphasis> } server { listen 127.0.0.1; location /upstream_conf { upstream_conf; } location /status { status; } location = /status.html { } } } stream { upstream <emphasis>backend</emphasis> { <emphasis>zone</emphasis> stream_backend 64k; server backend1.example.com:12345 weight=5; server backend2.example.com:12345; } server { listen 127.0.0.1:12345; proxy_pass backend; <emphasis>status_zone server_backend;</emphasis> health_check; } } </example> </para> <para> Examples of status requests with this configuration: <example> http://127.0.0.1/status http://127.0.0.1/status/nginx_version http://127.0.0.1/status/caches/cache_backend http://127.0.0.1/status/upstreams http://127.0.0.1/status/upstreams/backend http://127.0.0.1/status/upstreams/backend/peers/1 http://127.0.0.1/status/upstreams/backend/peers/1/weight http://127.0.0.1/status/stream http://127.0.0.1/status/stream/upstreams http://127.0.0.1/status/stream/upstreams/backend http://127.0.0.1/status/stream/upstreams/backend/peers/1 http://127.0.0.1/status/stream/upstreams/backend/peers/1/weight </example> </para> <para> The simple monitoring page is shipped with this distribution, accessible as “<literal>/status.html</literal>” in the default configuration. It requires the locations “<literal>/status</literal>” and “<literal>/status.html</literal>” to be configured as shown above. </para> </section> <section id="directives" name="Directives"> <directive name="status"> <syntax/> <default/> <context>location</context> <para> The status information will be accessible from the surrounding location. Access to this location should be <link doc="ngx_http_core_module.xml" id="satisfy">limited</link>. </para> </directive> <directive name="status_format"> <syntax><literal>json</literal></syntax> <syntax><literal>jsonp</literal> [<value>callback</value>]</syntax> <default>json</default> <context>http</context> <context>server</context> <context>location</context> <para> By default, status information is output in the JSON format. </para> <para> Alternatively, data may be output as JSONP. The <value>callback</value> parameter specifies the name of a callback function. The value can contain variables. If parameter is omitted, or the computed value is an empty string, then “<literal>ngx_status_jsonp_callback</literal>” is used. </para> </directive> <directive name="status_zone"> <syntax><value>zone</value></syntax> <default/> <context>server</context> <para> Enables collection of virtual <link doc="ngx_http_core_module.xml" id="server">http</link> or <link doc="../stream/ngx_stream_core_module.xml" id="server">stream</link> (1.7.11) server status information in the specified <value>zone</value>. Several servers may share the same zone. </para> </directive> </section> <section id="data" name="Data"> <para> The following status information is provided: <list type="tag"> <tag-name id="version"><literal>version</literal></tag-name> <tag-desc> Version of the provided data set. The current version is 8. </tag-desc> <tag-name><literal>nginx_version</literal></tag-name> <tag-desc> Version of nginx. </tag-desc> <tag-name id="nginx_build"><literal>nginx_build</literal></tag-name> <tag-desc> Name of nginx build. </tag-desc> <tag-name><literal>address</literal></tag-name> <tag-desc> The address of the server that accepted status request. </tag-desc> <tag-name id="generation"><literal>generation</literal></tag-name> <tag-desc> The total number of configuration <link doc="../control.xml" id="reconfiguration">reloads</link>. </tag-desc> <tag-name id="load_timestamp"><literal>load_timestamp</literal></tag-name> <tag-desc> Time of the last reload of configuration, in milliseconds since Epoch. </tag-desc> <tag-name><literal>timestamp</literal></tag-name> <tag-desc> Current time in milliseconds since Epoch. </tag-desc> <tag-name id="pid"><literal>pid</literal></tag-name> <tag-desc> The ID of the worker process that handled status request. </tag-desc> <tag-name id="ppid"><literal>ppid</literal></tag-name> <tag-desc> The ID of the master process that started the <link id="pid">worker process</link>. </tag-desc> <tag-name id="processes"><literal>processes</literal></tag-name> <tag-desc> <list type="tag"> <tag-name id="respawned"><literal>respawned</literal></tag-name> <tag-desc> The total number of abnormally terminated and respawned child processes. </tag-desc> </list> </tag-desc> <tag-name><literal>connections</literal></tag-name> <tag-desc> <list type="tag"> <tag-name><literal>accepted</literal></tag-name> <tag-desc> The total number of accepted client connections. </tag-desc> <tag-name><literal>dropped</literal></tag-name> <tag-desc> The total number of dropped client connections. </tag-desc> <tag-name><literal>active</literal></tag-name> <tag-desc> The current number of active client connections. </tag-desc> <tag-name><literal>idle</literal></tag-name> <tag-desc> The current number of idle client connections. </tag-desc> </list> </tag-desc> <tag-name id="ssl"><literal>ssl</literal></tag-name> <tag-desc> <list type="tag"> <tag-name><literal>handshakes</literal></tag-name> <tag-desc> The total number of successful SSL handshakes. </tag-desc> <tag-name><literal>handshakes_failed</literal></tag-name> <tag-desc> The total number of failed SSL handshakes. </tag-desc> <tag-name><literal>session_reuses</literal></tag-name> <tag-desc> The total number of session reuses during SSL handshake. </tag-desc> </list> </tag-desc> <tag-name><literal>requests</literal></tag-name> <tag-desc> <list type="tag"> <tag-name><literal>total</literal></tag-name> <tag-desc> The total number of client requests. </tag-desc> <tag-name><literal>current</literal></tag-name> <tag-desc> The current number of client requests. </tag-desc> </list> </tag-desc> <tag-name id="server_zones"><literal>server_zones</literal></tag-name> <tag-desc> For each <link id="status_zone"/>: <list type="tag"> <tag-name><literal>processing</literal></tag-name> <tag-desc> The number of client requests that are currently being processed. </tag-desc> <tag-name><literal>requests</literal></tag-name> <tag-desc> The total number of client requests received from clients. </tag-desc> <tag-name><literal>responses</literal></tag-name> <tag-desc> <list type="tag"> <tag-name><literal>total</literal></tag-name> <tag-desc> The total number of responses sent to clients. </tag-desc> <tag-name> <literal>1xx</literal>, <literal>2xx</literal>, <literal>3xx</literal>, <literal>4xx</literal>, <literal>5xx</literal> </tag-name> <tag-desc> The number of responses with status codes 1xx, 2xx, 3xx, 4xx, and 5xx. </tag-desc> </list> </tag-desc> <tag-name id="discarded"><literal>discarded</literal></tag-name> <tag-desc> The total number of requests completed without sending a response. </tag-desc> <tag-name><literal>received</literal></tag-name> <tag-desc> The total number of bytes received from clients. </tag-desc> <tag-name><literal>sent</literal></tag-name> <tag-desc> The total number of bytes sent to clients. </tag-desc> </list> </tag-desc> <tag-name id="slabs"><literal>slabs</literal></tag-name> <tag-desc> For each shared memory zone that uses slab allocator: <list type="tag"> <tag-name><literal>pages</literal></tag-name> <tag-desc> <list type="tag"> <tag-name><literal>used</literal></tag-name> <tag-desc> The current number of used memory pages. </tag-desc> <tag-name><literal>free</literal></tag-name> <tag-desc> The current number of free memory pages. </tag-desc> </list> </tag-desc> <tag-name><literal>slots</literal></tag-name> <tag-desc> For each memory slot size (8, 16, 32, 64, 128, etc.) the following data are provided: <list type="tag"> <tag-name><literal>used</literal></tag-name> <tag-desc> The current number of used memory slots. </tag-desc> <tag-name><literal>free</literal></tag-name> <tag-desc> The current number of free memory slots. </tag-desc> <tag-name><literal>reqs</literal></tag-name> <tag-desc> The total number of attempts to allocate memory of specified size. </tag-desc> <tag-name><literal>fails</literal></tag-name> <tag-desc> The number of unsuccessful attempts to allocate memory of specified size. </tag-desc> </list> </tag-desc> </list> </tag-desc> <tag-name id="upstreams"><literal>upstreams</literal></tag-name> <tag-desc> For each <link doc="ngx_http_upstream_module.xml" id="zone">dynamically configurable</link> <link doc="ngx_http_upstream_module.xml" id="upstream">group</link>, the following data are provided: <list type="tag"> <tag-name id="peers"><literal>peers</literal></tag-name> <tag-desc> For each <link doc="ngx_http_upstream_module.xml" id="server"/>, the following data are provided: <list type="tag"> <tag-name id="id"><literal>id</literal></tag-name> <tag-desc> The ID of the server. </tag-desc> <tag-name><literal>server</literal></tag-name> <tag-desc> An <link doc="ngx_http_upstream_module.xml" id="server">address</link> of the server. </tag-desc> <tag-name id="name"><literal>name</literal></tag-name> <tag-desc> The name of the server specified in the <link doc="ngx_http_upstream_module.xml" id="server"/> directive. </tag-desc> <tag-name id="service"><literal>service</literal></tag-name> <tag-desc> The <link doc="ngx_http_upstream_module.xml" id="service"/> parameter value of the <link doc="ngx_http_upstream_module.xml" id="server"/> directive. </tag-desc> <tag-name><literal>backup</literal></tag-name> <tag-desc> A boolean value indicating whether the server is a <link doc="ngx_http_upstream_module.xml" id="backup"/> server. </tag-desc> <tag-name><literal>weight</literal></tag-name> <tag-desc> <link doc="ngx_http_upstream_module.xml" id="weight">Weight</link> of the server. </tag-desc> <tag-name id="state"><literal>state</literal></tag-name> <tag-desc> Current state, which may be one of “<literal>up</literal>”, “<literal>draining</literal>”, “<literal>down</literal>”, “<literal>unavail</literal>”, “<literal>checking</literal>”, or “<literal>unhealthy</literal>”. </tag-desc> <tag-name><literal>active</literal></tag-name> <tag-desc> The current number of active connections. </tag-desc> <tag-name id="max_conns"><literal>max_conns</literal></tag-name> <tag-desc> The <link doc="ngx_http_upstream_module.xml" id="max_conns"/> limit for the server. </tag-desc> <tag-name><literal>requests</literal></tag-name> <tag-desc> The total number of client requests forwarded to this server. </tag-desc> <tag-name><literal>responses</literal></tag-name> <tag-desc> <list type="tag"> <tag-name><literal>total</literal></tag-name> <tag-desc> The total number of responses obtained from this server. </tag-desc> <tag-name> <literal>1xx</literal>, <literal>2xx</literal>, <literal>3xx</literal>, <literal>4xx</literal>, <literal>5xx</literal> </tag-name> <tag-desc> The number of responses with status codes 1xx, 2xx, 3xx, 4xx, and 5xx. </tag-desc> </list> </tag-desc> <tag-name><literal>sent</literal></tag-name> <tag-desc> The total number of bytes sent to this server. </tag-desc> <tag-name><literal>received</literal></tag-name> <tag-desc> The total number of bytes received from this server. </tag-desc> <tag-name><literal>fails</literal></tag-name> <tag-desc> The total number of unsuccessful attempts to communicate with the server. </tag-desc> <tag-name><literal>unavail</literal></tag-name> <tag-desc> How many times the server became unavailable for client requests (state “<literal>unavail</literal>”) due to the number of unsuccessful attempts reaching the <link doc="ngx_http_upstream_module.xml" id="max_fails"/> threshold. </tag-desc> <tag-name><literal>health_checks</literal></tag-name> <tag-desc> <list type="tag"> <tag-name><literal>checks</literal></tag-name> <tag-desc> The total number of <link doc="ngx_http_upstream_hc_module.xml" id="health_check">health check</link> requests made. </tag-desc> <tag-name><literal>fails</literal></tag-name> <tag-desc> The number of failed health checks. </tag-desc> <tag-name><literal>unhealthy</literal></tag-name> <tag-desc> How many times the server became unhealthy (state “<literal>unhealthy</literal>”). </tag-desc> <tag-name><literal>last_passed</literal></tag-name> <tag-desc> Boolean indicating if the last health check request was successful and passed <link doc="ngx_http_upstream_hc_module.xml" id="match">tests</link>. </tag-desc> </list> </tag-desc> <tag-name><literal>downtime</literal></tag-name> <tag-desc> Total time the server was in the “<literal>unavail</literal>”, “<literal>checking</literal>”, and “<literal>unhealthy</literal>” states. </tag-desc> <tag-name><literal>downstart</literal></tag-name> <tag-desc> The time (in milliseconds since Epoch) when the server became “<literal>unavail</literal>”, “<literal>checking</literal>”, or “<literal>unhealthy</literal>”. </tag-desc> <tag-name id="selected"><literal>selected</literal></tag-name> <tag-desc> The time (in milliseconds since Epoch) when the server was last selected to process a request (1.7.5). </tag-desc> <tag-name id="header_time"><literal>header_time</literal></tag-name> <tag-desc> The average time to get the <link doc="ngx_http_upstream_module.xml" id="var_upstream_header_time">response header</link> from the server (1.7.10). Prior to version 1.11.6, the field was available only when using the <link doc="ngx_http_upstream_module.xml" id="least_time"/> load balancing method. </tag-desc> <tag-name id="response_time"><literal>response_time</literal></tag-name> <tag-desc> The average time to get the <link doc="ngx_http_upstream_module.xml" id="var_upstream_response_time">full response</link> from the server (1.7.10). Prior to version 1.11.6, the field was available only when using the <link doc="ngx_http_upstream_module.xml" id="least_time"/> load balancing method. </tag-desc> </list> </tag-desc> <tag-name><literal>keepalive</literal></tag-name> <tag-desc> The current number of idle <link doc="ngx_http_upstream_module.xml" id="keepalive"/> connections. </tag-desc> <tag-name id="zombies"><literal>zombies</literal></tag-name> <tag-desc> The current number of servers removed from the group but still processing active client requests. </tag-desc> <tag-name id="zone"><literal>zone</literal></tag-name> <tag-desc> The name of the shared memory <link doc="ngx_http_upstream_module.xml" id="zone"/> that keeps the group’s configuration and run-time state. </tag-desc> <tag-name id="queue"><literal>queue</literal></tag-name> <tag-desc> For the requests <link doc="ngx_http_upstream_module.xml" id="queue"/>, the following data are provided: <list type="tag"> <tag-name><literal>size</literal></tag-name> <tag-desc> The current number of requests in the queue. </tag-desc> <tag-name id="max_size"><literal>max_size</literal></tag-name> <tag-desc> The maximum number of requests that can be in the queue at the same time. </tag-desc> <tag-name><literal>overflows</literal></tag-name> <tag-desc> The total number of requests rejected due to the queue overflow. </tag-desc> </list> </tag-desc> </list> </tag-desc> <tag-name id="caches"><literal>caches</literal></tag-name> <tag-desc> For each cache (configured by <link doc="ngx_http_proxy_module.xml" id="proxy_cache_path"/> and the likes): <list type="tag"> <tag-name><literal>size</literal></tag-name> <tag-desc> The current size of the cache. </tag-desc> <tag-name><literal>max_size</literal></tag-name> <tag-desc> The limit on the maximum size of the cache specified in the configuration. </tag-desc> <tag-name><literal>cold</literal></tag-name> <tag-desc> A boolean value indicating whether the “cache loader” process is still loading data from disk into the cache. </tag-desc> <tag-name> <literal>hit</literal>, <literal>stale</literal>, <literal>updating</literal>, <literal>revalidated</literal> </tag-name> <tag-desc> <list type="tag"> <tag-name><literal>responses</literal></tag-name> <tag-desc> The total number of responses read from the cache (hits, or stale responses due to <link doc="ngx_http_proxy_module.xml" id="proxy_cache_use_stale"/> and the likes). </tag-desc> <tag-name><literal>bytes</literal></tag-name> <tag-desc> The total number of bytes read from the cache. </tag-desc> </list> </tag-desc> <tag-name> <literal>miss</literal>, <literal>expired</literal>, <literal>bypass</literal> </tag-name> <tag-desc> <list type="tag"> <tag-name><literal>responses</literal></tag-name> <tag-desc> The total number of responses not taken from the cache (misses, expires, or bypasses due to <link doc="ngx_http_proxy_module.xml" id="proxy_cache_bypass"/> and the likes). </tag-desc> <tag-name><literal>bytes</literal></tag-name> <tag-desc> The total number of bytes read from the proxied server. </tag-desc> <tag-name><literal>responses_written</literal></tag-name> <tag-desc> The total number of responses written to the cache. </tag-desc> <tag-name><literal>bytes_written</literal></tag-name> <tag-desc> The total number of bytes written to the cache. </tag-desc> </list> </tag-desc> </list> </tag-desc> <tag-name id="stream"><literal>stream</literal></tag-name> <tag-desc> <list type="tag"> <tag-name id="stream_server_zones"><literal>server_zones</literal></tag-name> <tag-desc> For each <link id="status_zone"/>: <list type="tag"> <tag-name><literal>processing</literal></tag-name> <tag-desc> The number of client connections that are currently being processed. </tag-desc> <tag-name><literal>connections</literal></tag-name> <tag-desc> The total number of connections accepted from clients. </tag-desc> <tag-name id="sessions"><literal>sessions</literal></tag-name> <tag-desc> <list type="tag"> <tag-name><literal>total</literal></tag-name> <tag-desc> The total number of completed client sessions. </tag-desc> <tag-name> <literal>2xx</literal>, <literal>4xx</literal>, <literal>5xx</literal> </tag-name> <tag-desc> The number of sessions completed with <link doc="../stream/ngx_stream_core_module.xml" id="var_status">status codes</link> 2xx, 4xx, or 5xx. </tag-desc> </list> </tag-desc> <tag-name id="stream_discarded"><literal>discarded</literal></tag-name> <tag-desc> The total number of connections completed without creating a session. </tag-desc> <tag-name><literal>received</literal></tag-name> <tag-desc> The total number of bytes received from clients. </tag-desc> <tag-name><literal>sent</literal></tag-name> <tag-desc> The total number of bytes sent to clients. </tag-desc> </list> </tag-desc> <tag-name id="stream_upstreams"><literal>upstreams</literal></tag-name> <tag-desc> For each <link doc="../stream/ngx_stream_upstream_module.xml" id="zone">dynamically configurable</link> <link doc="../stream/ngx_stream_upstream_module.xml" id="upstream">group</link>, the following data are provided: <list type="tag"> <tag-name><literal>peers</literal></tag-name> <tag-desc> For each <link doc="../stream/ngx_stream_upstream_module.xml" id="server"/> the following data are provided: <list type="tag"> <tag-name><literal>id</literal></tag-name> <tag-desc> The ID of the server. </tag-desc> <tag-name><literal>server</literal></tag-name> <tag-desc> An <link doc="../stream/ngx_stream_upstream_module.xml" id="server">address</link> of the server. </tag-desc> <tag-name id="stream_name"><literal>name</literal></tag-name> <tag-desc> The name of the server specified in the <link doc="../stream/ngx_stream_upstream_module.xml" id="server"/> directive. </tag-desc> <tag-name id="stream_service"><literal>service</literal></tag-name> <tag-desc> The <link doc="../stream/ngx_stream_upstream_module.xml" id="service"/> parameter value of the <link doc="../stream/ngx_stream_upstream_module.xml" id="server"/> directive. </tag-desc> <tag-name><literal>backup</literal></tag-name> <tag-desc> A boolean value indicating whether the server is a <link doc="../stream/ngx_stream_upstream_module.xml" id="backup"/> server. </tag-desc> <tag-name><literal>weight</literal></tag-name> <tag-desc> <link doc="../stream/ngx_stream_upstream_module.xml" id="weight">Weight</link> of the server. </tag-desc> <tag-name><literal>state</literal></tag-name> <tag-desc> Current state, which may be one of “<literal>up</literal>”, “<literal>down</literal>”, “<literal>unavail</literal>”, “<literal>checking</literal>”, or “<literal>unhealthy</literal>”. </tag-desc> <tag-name><literal>active</literal></tag-name> <tag-desc> The current number of connections. </tag-desc> <tag-name><literal>max_conns</literal></tag-name> <tag-desc> The <link doc="../stream/ngx_stream_upstream_module.xml" id="max_conns"/> limit for the server. </tag-desc> <tag-name><literal>connections</literal></tag-name> <tag-desc> The total number of client connections forwarded to this server. </tag-desc> <tag-name><literal>connect_time</literal></tag-name> <tag-desc> The average time to connect to the upstream server. Prior to version 1.11.6, the field was available only when using the <link doc="../stream/ngx_stream_upstream_module.xml" id="least_time"/> load balancing method. </tag-desc> <tag-name><literal>first_byte_time</literal></tag-name> <tag-desc> The average time to receive the first byte of data. Prior to version 1.11.6, the field was available only when using the <link doc="../stream/ngx_stream_upstream_module.xml" id="least_time"/> load balancing method. </tag-desc> <tag-name><literal>response_time</literal></tag-name> <tag-desc> The average time to receive the last byte of data. Prior to version 1.11.6, the field was available only when using the <link doc="../stream/ngx_stream_upstream_module.xml" id="least_time"/> load balancing method. </tag-desc> <tag-name><literal>sent</literal></tag-name> <tag-desc> The total number of bytes sent to this server. </tag-desc> <tag-name><literal>received</literal></tag-name> <tag-desc> The total number of bytes received from this server. </tag-desc> <tag-name><literal>fails</literal></tag-name> <tag-desc> The total number of unsuccessful attempts to communicate with the server. </tag-desc> <tag-name><literal>unavail</literal></tag-name> <tag-desc> How many times the server became unavailable for client connections (state “<literal>unavail</literal>”) due to the number of unsuccessful attempts reaching the <link doc="../stream/ngx_stream_upstream_module.xml" id="max_fails"/> threshold. </tag-desc> <tag-name><literal>health_checks</literal></tag-name> <tag-desc> <list type="tag"> <tag-name><literal>checks</literal></tag-name> <tag-desc> The total number of <link doc="../stream/ngx_stream_upstream_hc_module.xml" id="health_check">health check</link> requests made. </tag-desc> <tag-name><literal>fails</literal></tag-name> <tag-desc> The number of failed health checks. </tag-desc> <tag-name><literal>unhealthy</literal></tag-name> <tag-desc> How many times the server became unhealthy (state “<literal>unhealthy</literal>”). </tag-desc> <tag-name><literal>last_passed</literal></tag-name> <tag-desc> Boolean indicating if the last health check request was successful and passed <link doc="../stream/ngx_stream_upstream_hc_module.xml" id="match">tests</link>. </tag-desc> </list> </tag-desc> <tag-name><literal>downtime</literal></tag-name> <tag-desc> Total time the server was in the “<literal>unavail</literal>”, “<literal>checking</literal>”, and “<literal>unhealthy</literal>” states. </tag-desc> <tag-name><literal>downstart</literal></tag-name> <tag-desc> The time (in milliseconds since Epoch) when the server became “<literal>unavail</literal>”, “<literal>checking</literal>”, or “<literal>unhealthy</literal>”. </tag-desc> <tag-name><literal>selected</literal></tag-name> <tag-desc> The time (in milliseconds since Epoch) when the server was last selected to process a connection. </tag-desc> </list> </tag-desc> <tag-name><literal>zombies</literal></tag-name> <tag-desc> The current number of servers removed from the group but still processing active client connections. </tag-desc> <tag-name><literal>zone</literal></tag-name> <tag-desc> The name of the shared memory <link doc="../stream/ngx_stream_upstream_module.xml" id="zone"/> that keeps the group’s configuration and run-time state. </tag-desc> </list> </tag-desc> </list> </tag-desc> </list> </para> </section> <section id="compatibility" name="Compatibility"> <para> <list type="bullet"> <listitem> The <link id="zone"/> field in <link id="upstreams">http</link> and <link id="stream_upstreams">stream</link> upstreams was added in <link id="version"/> 8. </listitem> <listitem> The <link id="slabs"/> status data were added in <link id="version"/> 8. </listitem> <listitem> The <link id="state">checking</link> state was added in <link id="version"/> 8. </listitem> <listitem> The <link id="name"/> and <link id="service"/> fields in <link id="upstreams">http</link> and <link id="stream_upstreams">stream</link> upstreams were added in <link id="version"/> 8. </listitem> <listitem> The <link id="nginx_build"/> and <link id="ppid"/> fields were added in <link id="version"/> 8. </listitem> <listitem> The <link id="sessions"/> status data and the <link id="stream_discarded">discarded</link> field in stream <link id="stream_server_zones">server_zones</link> were added in <link id="version"/> 7. </listitem> <listitem> The <link id="zombies"/> field was moved from nginx <link doc="../debugging_log.xml">debug</link> version in <link id="version"/> 6. </listitem> <listitem> The <link id="ssl"/> status data were added in <link id="version"/> 6. </listitem> <listitem> The <link id="discarded"/> field in <link id="server_zones"/> was added in <link id="version"/> 6. </listitem> <listitem> The <link id="queue"/> status data were added in <link id="version"/> 6. </listitem> <listitem> The <link id="pid"/> field was added in <link id="version"/> 6. </listitem> <listitem> The list of servers in <link id="upstreams"/> was moved into <link id="peers"/> in <link id="version"/> 6. </listitem> <listitem> The <literal>keepalive</literal> field of an upstream server was removed in <link id="version"/> 5. </listitem> <listitem> The <link id="stream">stream</link> status data were added in <link id="version"/> 5. </listitem> <listitem> The <link id="generation"/> field was added in <link id="version"/> 5. </listitem> <listitem> The <link id="respawned"/> field in <link id="processes"/> was added in <link id="version"/> 5. </listitem> <listitem> The <link id="header_time"/> and <link id="response_time"/> fields in <link id="upstreams"/> were added in <link id="version"/> 5. </listitem> <listitem> The <link id="selected"/> field in <link id="upstreams"/> was added in <link id="version"/> 4. </listitem> <listitem> The <link id="state">draining</link> state in <link id="upstreams"/> was added in <link id="version"/> 4. </listitem> <listitem> The <link id="id"/> and <link id="max_conns"/> fields in <link id="upstreams"/> were added in <link id="version"/> 3. </listitem> <listitem> The <literal>revalidated</literal> field in <link id="caches"/> was added in <link id="version"/> 3. </listitem> <listitem> The <link id="server_zones"/>, <link id="caches"/>, and <link id="load_timestamp"/> status data were added in <link id="version"/> 2. </listitem> </list> </para> </section> </module>