---
title: Memcache fields
description: Memcached-specific event fields 
url: https://www.elastic.co/elastic/docs-builder/docs/3028/reference/beats/packetbeat/exported-fields-memcache
products:
  - Beats
  - Packetbeat
applies_to:
  - Elastic Cloud Serverless: Generally available
  - Elastic Stack: Generally available
---

# Memcache fields
Memcached-specific event fields
<definitions>
  <definition term="memcache.protocol_type">
    The memcache protocol implementation. The value can be "binary" for binary-based, "text" for text-based, or "unknown" for an unknown memcache protocol type.
    type: keyword
  </definition>
  <definition term="memcache.request.line">
    The raw command line for unknown commands ONLY.
    type: keyword
  </definition>
  <definition term="memcache.request.command">
    The memcache command being requested in the memcache text protocol. For example "set" or "get". The binary protocol opcodes are translated into memcache text protocol commands.
    type: keyword
  </definition>
  <definition term="memcache.response.command">
    Either the text based protocol response message type or the name of the originating request if binary protocol is used.
    type: keyword
  </definition>
  <definition term="memcache.request.type">
    The memcache command classification. This value can be "UNKNOWN", "Load", "Store", "Delete", "Counter", "Info", "SlabCtrl", "LRUCrawler", "Stats", "Success", "Fail", or "Auth".
    type: keyword
  </definition>
  <definition term="memcache.response.type">
    The memcache command classification. This value can be "UNKNOWN", "Load", "Store", "Delete", "Counter", "Info", "SlabCtrl", "LRUCrawler", "Stats", "Success", "Fail", or "Auth". The text based protocol will employ any of these, whereas the binary based protocol will mirror the request commands only (see `memcache.response.status` for binary protocol).
    type: keyword
  </definition>
  <definition term="memcache.response.error_msg">
    The optional error message in the memcache response (text based protocol only).
    type: keyword
  </definition>
  <definition term="memcache.request.opcode">
    The binary protocol message opcode name.
    type: keyword
  </definition>
  <definition term="memcache.response.opcode">
    The binary protocol message opcode name.
    type: keyword
  </definition>
  <definition term="memcache.request.opcode_value">
    The binary protocol message opcode value.
    type: long
  </definition>
  <definition term="memcache.response.opcode_value">
    The binary protocol message opcode value.
    type: long
  </definition>
  <definition term="memcache.request.opaque">
    The binary protocol opaque header value used for correlating request with response messages.
    type: long
  </definition>
  <definition term="memcache.response.opaque">
    The binary protocol opaque header value used for correlating request with response messages.
    type: long
  </definition>
  <definition term="memcache.request.vbucket">
    The vbucket index sent in the binary message.
    type: long
  </definition>
  <definition term="memcache.response.status">
    The textual representation of the response error code (binary protocol only).
    type: keyword
  </definition>
  <definition term="memcache.response.status_code">
    The status code value returned in the response (binary protocol only).
    type: long
  </definition>
  <definition term="memcache.request.keys">
    The list of keys sent in the store or load commands.
    type: array
  </definition>
  <definition term="memcache.response.keys">
    The list of keys returned for the load command (if present).
    type: array
  </definition>
  <definition term="memcache.request.count_values">
    The number of values found in the memcache request message. If the command does not send any data, this field is missing.
    type: long
  </definition>
  <definition term="memcache.response.count_values">
    The number of values found in the memcache response message. If the command does not send any data, this field is missing.
    type: long
  </definition>
  <definition term="memcache.request.values">
    The list of base64 encoded values sent with the request (if present).
    type: array
  </definition>
  <definition term="memcache.response.values">
    The list of base64 encoded values sent with the response (if present).
    type: array
  </definition>
  <definition term="memcache.request.bytes">
    The byte count of the values being transferred.
    type: long
    format: bytes
  </definition>
  <definition term="memcache.response.bytes">
    The byte count of the values being transferred.
    type: long
    format: bytes
  </definition>
  <definition term="memcache.request.delta">
    The counter increment/decrement delta value.
    type: long
  </definition>
  <definition term="memcache.request.initial">
    The counter increment/decrement initial value parameter (binary protocol only).
    type: long
  </definition>
  <definition term="memcache.request.verbosity">
    The value of the memcache "verbosity" command.
    type: long
  </definition>
  <definition term="memcache.request.raw_args">
    The text protocol raw arguments for the "stats ..." and "lru crawl ..." commands.
    type: keyword
  </definition>
  <definition term="memcache.request.source_class">
    The source class id in 'slab reassign' command.
    type: long
  </definition>
  <definition term="memcache.request.dest_class">
    The destination class id in 'slab reassign' command.
    type: long
  </definition>
  <definition term="memcache.request.automove">
    The automove mode in the 'slab automove' command expressed as a string. This value can be "standby"(=0), "slow"(=1), "aggressive"(=2), or the raw value if the value is unknown.
    type: keyword
  </definition>
  <definition term="memcache.request.flags">
    The memcache command flags sent in the request (if present).
    type: long
  </definition>
  <definition term="memcache.response.flags">
    The memcache message flags sent in the response (if present).
    type: long
  </definition>
  <definition term="memcache.request.exptime">
    The data expiry time in seconds sent with the memcache command (if present). If the value is <30 days, the expiry time is relative to "now", or else it is an absolute Unix time in seconds (32-bit).
    type: long
  </definition>
  <definition term="memcache.request.sleep_us">
    The sleep setting in microseconds for the 'lru_crawler sleep' command.
    type: long
  </definition>
  <definition term="memcache.response.value">
    The counter value returned by a counter operation.
    type: long
  </definition>
  <definition term="memcache.request.noreply">
    Set to true if noreply was set in the request. The `memcache.response` field will be missing.
    type: boolean
  </definition>
  <definition term="memcache.request.quiet">
    Set to true if the binary protocol message is to be treated as a quiet message.
    type: boolean
  </definition>
  <definition term="memcache.request.cas_unique">
    The CAS (compare-and-swap) identifier if present.
    type: long
  </definition>
  <definition term="memcache.response.cas_unique">
    The CAS (compare-and-swap) identifier to be used with CAS-based updates (if present).
    type: long
  </definition>
  <definition term="memcache.response.stats">
    The list of statistic values returned. Each entry is a dictionary with the fields "name" and "value".
    type: array
  </definition>
  <definition term="memcache.response.version">
    The returned memcache version string.
    type: keyword
  </definition>
</definitions>