[ aws . elasticache ]
describe-engine-default-parameters¶
Description¶
Returns the default engine and system parameter information for the specified cache engine.
See also: AWS API Documentation
describe-engine-default-parameters is a paginated operation. Multiple API calls may be issued in order to retrieve the entire data set of results. You can disable pagination by providing the --no-paginate argument.
When using --output text and the --query argument on a paginated response, the --query argument must extract data from the results of the following query expressions: EngineDefaults.Parameters
Synopsis¶
describe-engine-default-parameters
--cache-parameter-group-family <value>
[--cli-input-json | --cli-input-yaml]
[--starting-token <value>]
[--page-size <value>]
[--max-items <value>]
[--generate-cli-skeleton <value>]
[--debug]
[--endpoint-url <value>]
[--no-verify-ssl]
[--no-paginate]
[--output <value>]
[--query <value>]
[--profile <value>]
[--region <value>]
[--version <value>]
[--color <value>]
[--no-sign-request]
[--ca-bundle <value>]
[--cli-read-timeout <value>]
[--cli-connect-timeout <value>]
[--cli-binary-format <value>]
[--no-cli-pager]
[--cli-auto-prompt]
[--no-cli-auto-prompt]
Options¶
--cache-parameter-group-family (string)
The name of the cache parameter group family.
Valid values are:
memcached1.4|memcached1.5|memcached1.6|redis2.6|redis2.8|redis3.2|redis4.0|redis5.0|redis6.x|redis6.2|redis7
--cli-input-json | --cli-input-yaml (string)
Reads arguments from the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, those values will override the JSON-provided values. It is not possible to pass arbitrary binary values using a JSON-provided value as the string will be taken literally. This may not be specified along with --cli-input-yaml.
--starting-token (string)
A token to specify where to start paginating. This is the
NextTokenfrom a previously truncated response.For usage examples, see Pagination in the AWS Command Line Interface User Guide .
--page-size (integer)
The size of each page to get in the AWS service call. This does not affect the number of items returned in the command’s output. Setting a smaller page size results in more calls to the AWS service, retrieving fewer items in each call. This can help prevent the AWS service calls from timing out.
For usage examples, see Pagination in the AWS Command Line Interface User Guide .
--max-items (integer)
The total number of items to return in the command’s output. If the total number of items available is more than the value specified, a
NextTokenis provided in the command’s output. To resume pagination, provide theNextTokenvalue in thestarting-tokenargument of a subsequent command. Do not use theNextTokenresponse element directly outside of the AWS CLI.For usage examples, see Pagination in the AWS Command Line Interface User Guide .
--generate-cli-skeleton (string)
Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. Similarly, if provided yaml-input it will print a sample input YAML that can be used with --cli-input-yaml. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command. The generated JSON skeleton is not stable between versions of the AWS CLI and there are no backwards compatibility guarantees in the JSON skeleton generated.
Global Options¶
--debug (boolean)
Turn on debug logging.
--endpoint-url (string)
Override command’s default URL with the given URL.
--no-verify-ssl (boolean)
By default, the AWS CLI uses SSL when communicating with AWS services. For each SSL connection, the AWS CLI will verify SSL certificates. This option overrides the default behavior of verifying SSL certificates.
--no-paginate (boolean)
Disable automatic pagination.
--output (string)
The formatting style for command output.
json
text
table
yaml
yaml-stream
--query (string)
A JMESPath query to use in filtering the response data.
--profile (string)
Use a specific profile from your credential file.
--region (string)
The region to use. Overrides config/env settings.
--version (string)
Display the version of this tool.
--color (string)
Turn on/off color output.
on
off
auto
--no-sign-request (boolean)
Do not sign requests. Credentials will not be loaded if this argument is provided.
--ca-bundle (string)
The CA certificate bundle to use when verifying SSL certificates. Overrides config/env settings.
--cli-read-timeout (int)
The maximum socket read time in seconds. If the value is set to 0, the socket read will be blocking and not timeout. The default value is 60 seconds.
--cli-connect-timeout (int)
The maximum socket connect time in seconds. If the value is set to 0, the socket connect will be blocking and not timeout. The default value is 60 seconds.
--cli-binary-format (string)
The formatting style to be used for binary blobs. The default format is base64. The base64 format expects binary blobs to be provided as a base64 encoded string. The raw-in-base64-out format preserves compatibility with AWS CLI V1 behavior and binary values must be passed literally. When providing contents from a file that map to a binary blob fileb:// will always be treated as binary and use the file contents directly regardless of the cli-binary-format setting. When using file:// the file contents will need to properly formatted for the configured cli-binary-format.
base64
raw-in-base64-out
--no-cli-pager (boolean)
Disable cli pager for output.
--cli-auto-prompt (boolean)
Automatically prompt for CLI input parameters.
--no-cli-auto-prompt (boolean)
Disable automatically prompt for CLI input parameters.
Examples¶
Note
To use the following examples, you must have the AWS CLI installed and configured. See the Getting started guide in the AWS CLI User Guide for more information.
Unless otherwise stated, all examples have unix-like quotation rules. These examples will need to be adapted to your terminal’s quoting rules. See Using quotation marks with strings in the AWS CLI User Guide .
To describe engine default parameters
The following describe-engine-default-parameters example returns the default engine and system parameter information for the specified cache engine.
aws elasticache describe-engine-default-parameters \
--cache-parameter-group-family "redis5.0"
Output:
{
"EngineDefaults": {
"Parameters": [
{
"ParameterName": "activedefrag",
"ParameterValue": "no",
"Description": "Enabled active memory defragmentation",
"Source": "system",
"DataType": "string",
"AllowedValues": "yes,no",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "active-defrag-cycle-max",
"ParameterValue": "75",
"Description": "Maximal effort for defrag in CPU percentage",
"Source": "system",
"DataType": "integer",
"AllowedValues": "1-75",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "active-defrag-cycle-min",
"ParameterValue": "5",
"Description": "Minimal effort for defrag in CPU percentage",
"Source": "system",
"DataType": "integer",
"AllowedValues": "1-75",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "active-defrag-ignore-bytes",
"ParameterValue": "104857600",
"Description": "Minimum amount of fragmentation waste to start active defrag",
"Source": "system",
"DataType": "integer",
"AllowedValues": "1048576-",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "active-defrag-max-scan-fields",
"ParameterValue": "1000",
"Description": "Maximum number of set/hash/zset/list fields that will be processed from the main dictionary scan",
"Source": "system",
"DataType": "integer",
"AllowedValues": "1-1000000",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "active-defrag-threshold-lower",
"ParameterValue": "10",
"Description": "Minimum percentage of fragmentation to start active defrag",
"Source": "system",
"DataType": "integer",
"AllowedValues": "1-100",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "active-defrag-threshold-upper",
"ParameterValue": "100",
"Description": "Maximum percentage of fragmentation at which we use maximum effort",
"Source": "system",
"DataType": "integer",
"AllowedValues": "1-100",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "activerehashing",
"ParameterValue": "yes",
"Description": "Apply rehashing or not.",
"Source": "system",
"DataType": "string",
"AllowedValues": "yes,no",
"IsModifiable": false,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "requires-reboot"
},
{
"ParameterName": "appendfsync",
"ParameterValue": "everysec",
"Description": "fsync policy for AOF persistence",
"Source": "system",
"DataType": "string",
"AllowedValues": "always,everysec,no",
"IsModifiable": false,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "appendonly",
"ParameterValue": "no",
"Description": "Enable Redis persistence.",
"Source": "system",
"DataType": "string",
"AllowedValues": "yes,no",
"IsModifiable": false,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "client-output-buffer-limit-normal-hard-limit",
"ParameterValue": "0",
"Description": "Normal client output buffer hard limit in bytes.",
"Source": "system",
"DataType": "integer",
"AllowedValues": "0-",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "client-output-buffer-limit-normal-soft-limit",
"ParameterValue": "0",
"Description": "Normal client output buffer soft limit in bytes.",
"Source": "system",
"DataType": "integer",
"AllowedValues": "0-",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "client-output-buffer-limit-normal-soft-seconds",
"ParameterValue": "0",
"Description": "Normal client output buffer soft limit in seconds.",
"Source": "system",
"DataType": "integer",
"AllowedValues": "0-",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "client-output-buffer-limit-pubsub-hard-limit",
"ParameterValue": "33554432",
"Description": "Pubsub client output buffer hard limit in bytes.",
"Source": "system",
"DataType": "integer",
"AllowedValues": "0-",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "client-output-buffer-limit-pubsub-soft-limit",
"ParameterValue": "8388608",
"Description": "Pubsub client output buffer soft limit in bytes.",
"Source": "system",
"DataType": "integer",
"AllowedValues": "0-",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "client-output-buffer-limit-pubsub-soft-seconds",
"ParameterValue": "60",
"Description": "Pubsub client output buffer soft limit in seconds.",
"Source": "system",
"DataType": "integer",
"AllowedValues": "0-",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "client-output-buffer-limit-replica-soft-seconds",
"ParameterValue": "60",
"Description": "Replica client output buffer soft limit in seconds.",
"Source": "system",
"DataType": "integer",
"AllowedValues": "0-",
"IsModifiable": false,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "client-query-buffer-limit",
"ParameterValue": "1073741824",
"Description": "Max size of a single client query buffer",
"Source": "system",
"DataType": "integer",
"AllowedValues": "1048576-1073741824",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "close-on-replica-write",
"ParameterValue": "yes",
"Description": "If enabled, clients who attempt to write to a read-only replica will be disconnected. Applicable to 2.8.23 and higher.",
"Source": "system",
"DataType": "string",
"AllowedValues": "yes,no",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "cluster-enabled",
"ParameterValue": "no",
"Description": "Enable cluster mode",
"Source": "system",
"DataType": "string",
"AllowedValues": "yes,no",
"IsModifiable": false,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "requires-reboot"
},
{
"ParameterName": "cluster-require-full-coverage",
"ParameterValue": "no",
"Description": "Whether cluster becomes unavailable if one or more slots are not covered",
"Source": "system",
"DataType": "string",
"AllowedValues": "yes,no",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "databases",
"ParameterValue": "16",
"Description": "Set the number of databases.",
"Source": "system",
"DataType": "integer",
"AllowedValues": "1-1200000",
"IsModifiable": false,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "requires-reboot"
},
{
"ParameterName": "hash-max-ziplist-entries",
"ParameterValue": "512",
"Description": "The maximum number of hash entries in order for the dataset to be compressed.",
"Source": "system",
"DataType": "integer",
"AllowedValues": "0-",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "hash-max-ziplist-value",
"ParameterValue": "64",
"Description": "The threshold of biggest hash entries in order for the dataset to be compressed.",
"Source": "system",
"DataType": "integer",
"AllowedValues": "0-",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "hll-sparse-max-bytes",
"ParameterValue": "3000",
"Description": "HyperLogLog sparse representation bytes limit",
"Source": "system",
"DataType": "integer",
"AllowedValues": "1-16000",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "lazyfree-lazy-eviction",
"ParameterValue": "no",
"Description": "Perform an asynchronous delete on evictions",
"Source": "system",
"DataType": "string",
"AllowedValues": "yes,no",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "lazyfree-lazy-expire",
"ParameterValue": "no",
"Description": "Perform an asynchronous delete on expired keys",
"Source": "system",
"DataType": "string",
"AllowedValues": "yes,no",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "lazyfree-lazy-server-del",
"ParameterValue": "no",
"Description": "Perform an asynchronous delete on key updates",
"Source": "system",
"DataType": "string",
"AllowedValues": "yes,no",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "lfu-decay-time",
"ParameterValue": "1",
"Description": "The amount of time in minutes to decrement the key counter for LFU eviction policy",
"Source": "system",
"DataType": "integer",
"AllowedValues": "0-",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "lfu-log-factor",
"ParameterValue": "10",
"Description": "The log factor for incrementing key counter for LFU eviction policy",
"Source": "system",
"DataType": "integer",
"AllowedValues": "1-",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "list-compress-depth",
"ParameterValue": "0",
"Description": "Number of quicklist ziplist nodes from each side of the list to exclude from compression. The head and tail of the list are always uncompressed for fast push/pop operations",
"Source": "system",
"DataType": "integer",
"AllowedValues": "0-",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "list-max-ziplist-size",
"ParameterValue": "-2",
"Description": "The number of entries allowed per internal list node can be specified as a fixed maximum size or a maximum number of elements",
"Source": "system",
"DataType": "integer",
"AllowedValues": "-5,-4,-3,-2,-1,1-",
"IsModifiable": false,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "lua-replicate-commands",
"ParameterValue": "yes",
"Description": "Always enable Lua effect replication or not",
"Source": "system",
"DataType": "string",
"AllowedValues": "yes,no",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "lua-time-limit",
"ParameterValue": "5000",
"Description": "Max execution time of a Lua script in milliseconds. 0 for unlimited execution without warnings.",
"Source": "system",
"DataType": "integer",
"AllowedValues": "5000",
"IsModifiable": false,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "maxclients",
"ParameterValue": "65000",
"Description": "The maximum number of Redis clients.",
"Source": "system",
"DataType": "integer",
"AllowedValues": "1-65000",
"IsModifiable": false,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "requires-reboot"
},
{
"ParameterName": "maxmemory-policy",
"ParameterValue": "volatile-lru",
"Description": "Max memory policy.",
"Source": "system",
"DataType": "string",
"AllowedValues": "volatile-lru,allkeys-lru,volatile-lfu,allkeys-lfu,volatile-random,allkeys-random,volatile-ttl,noeviction",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "maxmemory-samples",
"ParameterValue": "3",
"Description": "Max memory samples.",
"Source": "system",
"DataType": "integer",
"AllowedValues": "1-",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "min-replicas-max-lag",
"ParameterValue": "10",
"Description": "The maximum amount of replica lag in seconds beyond which the master would stop taking writes. A value of 0 means the master always takes writes.",
"Source": "system",
"DataType": "integer",
"AllowedValues": "0-",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "min-replicas-to-write",
"ParameterValue": "0",
"Description": "The minimum number of replicas that must be present with lag no greater than min-replicas-max-lag for master to take writes. Setting this to 0 means the master always takes writes.",
"Source": "system",
"DataType": "integer",
"AllowedValues": "0-",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "notify-keyspace-events",
"Description": "The keyspace events for Redis to notify Pub/Sub clients about. By default all notifications are disabled",
"Source": "system",
"DataType": "string",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "proto-max-bulk-len",
"ParameterValue": "536870912",
"Description": "Max size of a single element request",
"Source": "system",
"DataType": "integer",
"AllowedValues": "1048576-536870912",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "rename-commands",
"ParameterValue": "",
"Description": "Redis commands that can be dynamically renamed by the customer",
"Source": "system",
"DataType": "string",
"AllowedValues": "APPEND,BITCOUNT,BITFIELD,BITOP,BITPOS,BLPOP,BRPOP,BRPOPLPUSH,BZPOPMIN,BZPOPMAX,CLIENT,COMMAND,DBSIZE,DECR,DECRBY,DEL,DISCARD,DUMP,ECHO,EVAL,EVALSHA,EXEC,EXISTS,EXPIRE,EXPIREAT,FLUSHALL,FLUSHDB,GEOADD,GEOHASH,GEOPOS,GEODIST,GEORADIUS,GEORADIUSBYMEMBER,GET,GETBIT,GETRANGE,GETSET,HDEL,HEXISTS,HGET,HGETALL,HINCRBY,HINCRBYFLOAT,HKEYS,HLEN,HMGET,HMSET,HSET,HSETNX,HSTRLEN,HVALS,INCR,INCRBY,INCRBYFLOAT,INFO,KEYS,LASTSAVE,LINDEX,LINSERT,LLEN,LPOP,LPUSH,LPUSHX,LRANGE,LREM,LSET,LTRIM,MEMORY,MGET,MONITOR,MOVE,MSET,MSETNX,MULTI,OBJECT,PERSIST,PEXPIRE,PEXPIREAT,PFADD,PFCOUNT,PFMERGE,PING,PSETEX,PSUBSCRIBE,PUBSUB,PTTL,PUBLISH,PUNSUBSCRIBE,RANDOMKEY,READONLY,READWRITE,RENAME,RENAMENX,RESTORE,ROLE,RPOP,RPOPLPUSH,RPUSH,RPUSHX,SADD,SCARD,SCRIPT,SDIFF,SDIFFSTORE,SELECT,SET,SETBIT,SETEX,SETNX,SETRANGE,SINTER,SINTERSTORE,SISMEMBER,SLOWLOG,SMEMBERS,SMOVE,SORT,SPOP,SRANDMEMBER,SREM,STRLEN,SUBSCRIBE,SUNION,SUNIONSTORE,SWAPDB,TIME,TOUCH,TTL,TYPE,UNSUBSCRIBE,UNLINK,UNWATCH,WAIT,WATCH,ZADD,ZCARD,ZCOUNT,ZINCRBY,ZINTERSTORE,ZLEXCOUNT,ZPOPMAX,ZPOPMIN,ZRANGE,ZRANGEBYLEX,ZREVRANGEBYLEX,ZRANGEBYSCORE,ZRANK,ZREM,ZREMRANGEBYLEX,ZREMRANGEBYRANK,ZREMRANGEBYSCORE,ZREVRANGE,ZREVRANGEBYSCORE,ZREVRANK,ZSCORE,ZUNIONSTORE,SCAN,SSCAN,HSCAN,ZSCAN,XINFO,XADD,XTRIM,XDEL,XRANGE,XREVRANGE,XLEN,XREAD,XGROUP,XREADGROUP,XACK,XCLAIM,XPENDING,GEORADIUS_RO,GEORADIUSBYMEMBER_RO,LOLWUT,XSETID,SUBSTR",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.3",
"ChangeType": "immediate"
},
{
"ParameterName": "repl-backlog-size",
"ParameterValue": "1048576",
"Description": "The replication backlog size in bytes for PSYNC. This is the size of the buffer which accumulates slave data when slave is disconnected for some time, so that when slave reconnects again, only transfer the portion of data which the slave missed. Minimum value is 16K.",
"Source": "system",
"DataType": "integer",
"AllowedValues": "16384-",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "repl-backlog-ttl",
"ParameterValue": "3600",
"Description": "The amount of time in seconds after the master no longer have any slaves connected for the master to free the replication backlog. A value of 0 means to never release the backlog.",
"Source": "system",
"DataType": "integer",
"AllowedValues": "0-",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "replica-allow-chaining",
"ParameterValue": "no",
"Description": "Configures if chaining of replicas is allowed",
"Source": "system",
"DataType": "string",
"AllowedValues": "yes,no",
"IsModifiable": false,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "replica-ignore-maxmemory",
"ParameterValue": "yes",
"Description": "Determines if replica ignores maxmemory setting by not evicting items independent from the master",
"Source": "system",
"DataType": "string",
"AllowedValues": "yes,no",
"IsModifiable": false,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "replica-lazy-flush",
"ParameterValue": "no",
"Description": "Perform an asynchronous flushDB during replica sync",
"Source": "system",
"DataType": "string",
"AllowedValues": "yes,no",
"IsModifiable": false,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "reserved-memory-percent",
"ParameterValue": "25",
"Description": "The percent of memory reserved for non-cache memory usage. You may want to increase this parameter for nodes with read replicas, AOF enabled, etc, to reduce swap usage.",
"Source": "system",
"DataType": "integer",
"AllowedValues": "0-100",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "set-max-intset-entries",
"ParameterValue": "512",
"Description": "The limit in the size of the set in order for the dataset to be compressed.",
"Source": "system",
"DataType": "integer",
"AllowedValues": "0-",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "slowlog-log-slower-than",
"ParameterValue": "10000",
"Description": "The execution time, in microseconds, to exceed in order for the command to get logged. Note that a negative number disables the slow log, while a value of zero forces the logging of every command.",
"Source": "system",
"DataType": "integer",
"AllowedValues": "-",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "slowlog-max-len",
"ParameterValue": "128",
"Description": "The length of the slow log. There is no limit to this length. Just be aware that it will consume memory. You can reclaim memory used by the slow log with SLOWLOG RESET.",
"Source": "system",
"DataType": "integer",
"AllowedValues": "0-",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "stream-node-max-bytes",
"ParameterValue": "4096",
"Description": "The maximum size of a single node in a stream in bytes",
"Source": "system",
"DataType": "integer",
"AllowedValues": "0-",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "stream-node-max-entries",
"ParameterValue": "100",
"Description": "The maximum number of items a single node in a stream can contain",
"Source": "system",
"DataType": "integer",
"AllowedValues": "0-",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "tcp-keepalive",
"ParameterValue": "300",
"Description": "If non-zero, send ACKs every given number of seconds.",
"Source": "system",
"DataType": "integer",
"AllowedValues": "0-",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "timeout",
"ParameterValue": "0",
"Description": "Close connection if client is idle for a given number of seconds, or never if 0.",
"Source": "system",
"DataType": "integer",
"AllowedValues": "0,20-",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "zset-max-ziplist-entries",
"ParameterValue": "128",
"Description": "The maximum number of sorted set entries in order for the dataset to be compressed.",
"Source": "system",
"DataType": "integer",
"AllowedValues": "0-",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
},
{
"ParameterName": "zset-max-ziplist-value",
"ParameterValue": "64",
"Description": "The threshold of biggest sorted set entries in order for the dataset to be compressed.",
"Source": "system",
"DataType": "integer",
"AllowedValues": "0-",
"IsModifiable": true,
"MinimumEngineVersion": "5.0.0",
"ChangeType": "immediate"
}
]
}
}
Output¶
EngineDefaults -> (structure)
Represents the output of a
DescribeEngineDefaultParametersoperation.CacheParameterGroupFamily -> (string)
Specifies the name of the cache parameter group family to which the engine default parameters apply.
Valid values are:
memcached1.4|memcached1.5|memcached1.6|redis2.6|redis2.8|redis3.2|redis4.0|redis5.0|redis6.0|redis6.xMarker -> (string)
Provides an identifier to allow retrieval of paginated results.
Parameters -> (list)
Contains a list of engine default parameters.
(structure)
Describes an individual setting that controls some aspect of ElastiCache behavior.
ParameterName -> (string)
The name of the parameter.
ParameterValue -> (string)
The value of the parameter.
Description -> (string)
A description of the parameter.
Source -> (string)
The source of the parameter.
DataType -> (string)
The valid data type for the parameter.
AllowedValues -> (string)
The valid range of values for the parameter.
IsModifiable -> (boolean)
Indicates whether (
true) or not (false) the parameter can be modified. Some parameters have security or operational implications that prevent them from being changed.MinimumEngineVersion -> (string)
The earliest cache engine version to which the parameter can apply.
ChangeType -> (string)
Indicates whether a change to the parameter is applied immediately or requires a reboot for the change to be applied. You can force a reboot or wait until the next maintenance window’s reboot. For more information, see Rebooting a Cluster .
CacheNodeTypeSpecificParameters -> (list)
A list of parameters specific to a particular cache node type. Each element in the list contains detailed information about one parameter.
(structure)
A parameter that has a different value for each cache node type it is applied to. For example, in a Redis cluster, a
cache.m1.largecache node type would have a largermaxmemoryvalue than acache.m1.smalltype.ParameterName -> (string)
The name of the parameter.
Description -> (string)
A description of the parameter.
Source -> (string)
The source of the parameter value.
DataType -> (string)
The valid data type for the parameter.
AllowedValues -> (string)
The valid range of values for the parameter.
IsModifiable -> (boolean)
Indicates whether (
true) or not (false) the parameter can be modified. Some parameters have security or operational implications that prevent them from being changed.MinimumEngineVersion -> (string)
The earliest cache engine version to which the parameter can apply.
CacheNodeTypeSpecificValues -> (list)
A list of cache node types and their corresponding values for this parameter.
(structure)
A value that applies only to a certain cache node type.
CacheNodeType -> (string)
The cache node type for which this value applies.
Value -> (string)
The value for the cache node type.
ChangeType -> (string)
Indicates whether a change to the parameter is applied immediately or requires a reboot for the change to be applied. You can force a reboot or wait until the next maintenance window’s reboot. For more information, see Rebooting a Cluster .