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# Exercise the code path for INFORMATION_SCHEMA.INNODB_BUFFER_POOL_STATS
# and INFORMATION_SCHEMA.INNODB_BUFFER_PAGE
-- source include/have_innodb_plugin.inc
-- disable_result_log
SELECT * FROM INFORMATION_SCHEMA.INNODB_BUFFER_POOL_STATS;
# How many buffer pools we have
SELECT count(*) FROM INFORMATION_SCHEMA.INNODB_BUFFER_POOL_STATS;
SELECT * FROM INFORMATION_SCHEMA.INNODB_BUFFER_PAGE;
# This gives the over all buffer pool size
SELECT COUNT(*) FROM INFORMATION_SCHEMA.INNODB_BUFFER_PAGE;
-- enable_result_log
# Create a table and check its page info behave correctly in the pool
CREATE TABLE infoschema_buffer_test (col1 INT) ENGINE = INNODB;
INSERT INTO infoschema_buffer_test VALUES(9);
# We should be able to see this table in the buffer pool if we check
# right away
SELECT TABLE_NAME, INDEX_NAME, NUMBER_RECORDS, DATA_SIZE, PAGE_STATE, PAGE_TYPE
FROM INFORMATION_SCHEMA.INNODB_BUFFER_PAGE
WHERE TABLE_NAME like "%infoschema_buffer_test"
and PAGE_STATE="file_page" and PAGE_TYPE="index";
# The NUMBER_RECORDS and DATA_SIZE should check with each insertion
INSERT INTO infoschema_buffer_test VALUES(19);
SELECT TABLE_NAME, INDEX_NAME, NUMBER_RECORDS, DATA_SIZE, PAGE_STATE, PAGE_TYPE
FROM INFORMATION_SCHEMA.INNODB_BUFFER_PAGE
WHERE TABLE_NAME like "%infoschema_buffer_test"
and PAGE_STATE="file_page" and PAGE_TYPE="index";
CREATE INDEX idx ON infoschema_buffer_test(col1);
SELECT TABLE_NAME, INDEX_NAME, NUMBER_RECORDS, DATA_SIZE, PAGE_STATE, PAGE_TYPE
FROM INFORMATION_SCHEMA.INNODB_BUFFER_PAGE
WHERE TABLE_NAME like "%infoschema_buffer_test"
and PAGE_STATE="file_page" and INDEX_NAME = "idx" and PAGE_TYPE="index";
# Check the buffer after dropping the table
DROP TABLE infoschema_buffer_test;
SELECT TABLE_NAME, INDEX_NAME, NUMBER_RECORDS, DATA_SIZE, PAGE_STATE, PAGE_TYPE
FROM INFORMATION_SCHEMA.INNODB_BUFFER_PAGE
WHERE TABLE_NAME like "%infoschema_buffer_test";
# Do one more test
#--replace_regex /'*[0-9]*'/'NUM'/
CREATE TABLE infoschema_parent (id INT NOT NULL, PRIMARY KEY (id))
ENGINE=INNODB;
CREATE TABLE infoschema_child (id INT, parent_id INT, INDEX par_ind (parent_id),
FOREIGN KEY (parent_id)
REFERENCES infoschema_parent(id)
ON DELETE CASCADE)
ENGINE=INNODB;
SELECT count(*)
FROM INFORMATION_SCHEMA.INNODB_BUFFER_PAGE
WHERE TABLE_NAME like "%infoschema_child" and PAGE_STATE="file_page"
and PAGE_TYPE="index";
DROP TABLE infoschema_child;
DROP TABLE infoschema_parent;
show create table information_schema.innodb_buffer_page;
show create table information_schema.innodb_buffer_page_lru;
show create table information_schema.innodb_buffer_pool_stats;
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