php ini begin,PHP: 运行时配置 - Manual

mysqlnd_qc.enable_qc

int

Enables or disables the plugin. If disabled the extension will not plug

into

mysqlnd to proxy internal

mysqlnd C API calls.

mysqlnd_qc.ttl

int

Default Time-to-Live (TTL) for cache entries in seconds.

mysqlnd_qc.cache_by_default

int

Cache all queries regardless if they begin with the SQL hint that

enables caching of a query or not. Storage handler cannot overrule

the setting. It is evaluated by the core of the plugin.

mysqlnd_qc.cache_no_table

int

Whether to cache queries with no table name in any of columns meta data

of their result set, for example,

SELECT SLEEP(1), SELECT NOW(),

SELECT SUBSTRING().

mysqlnd_qc.use_request_time

int

Use PHP global request time to avoid

gettimeofday() system calls?

If using

APC storage handler

it should be set to the value of

apc.use_request_time, if not

warnings will be generated.

mysqlnd_qc.time_statistics

int

Collect run time and store time statistics using

gettimeofday() system call? Data will be

collected only if you also set

mysqlnd_qc.collect_statistics = 1,

mysqlnd_qc.collect_statistics

int

Collect statistics for

mysqlnd_qc.collect_statistics-log-file

int

If mysqlnd_qc.collect_statistics and

mysqlnd_qc.collect_statistics_log_file

are set, the plugin will dump statistics into the specified

log file at every 10th web request during PHP request shutdown.

The log file needs to be writable by the web server user.

Since 1.1.0.

mysqlnd_qc.collect_query_trace

int

Collect query back traces?

mysqlnd_qc.query_trace_bt_depth

int

Maximum depth/level of a query code backtrace.

mysqlnd_qc.ignore_sql_comments

int

Whether to remove SQL comments from a query string before

hashing it to generate a cache key. Disable if you do not want

two statemts such as SELECT /*my_source_ip=123*/ id FROM test

and SELECT /*my_source_ip=456*/ id FROM test to refer

to the same cache entry.

Since 1.1.0.

mysqlnd_qc.slam_defense

int

Activates handler based slam defense (cache stampeding protection) if available.

Supported by

Default and

APC storage handler

mysqlnd_qc.slam_defense_ttl

int

TTL for stale cache entries which are

served while another client updates the entries. Supported by

APC storage handler.

mysqlnd_qc.collect_normalized_query_trace

int

Collect aggregated normalized query traces? The setting

has no effect by default. You compile the extension

using the define

NORM_QUERY_TRACE_LOG to make use of the setting.

mysqlnd_qc.std_data_copy

int

Default storage handler: copy cached wire data?

EXPERIMENTAL – use default setting!

mysqlnd_qc.apc_prefix

string

The

APC storage handler stores data in the

APC user cache. The setting sets a prefix to be

used for cache entries.

mysqlnd_qc.memc_server

string

MEMCACHE storage handler: memcache server host.

mysqlnd_qc.memc_port

int

MEMCACHE storage handler: memcached server port.

mysqlnd_qc.sqlite_data_file

string

sqlite storage handler: data file. Any setting

but :memory: may be of little practical value.