Zabbix Server slowly

[fjareta]

Hi Guys!!

My Zabbix server lately has been showing slow overall and your bank has also grown very fast, around 50GB in 3 months. Can anyone recommend me? I will post parts of my server.conf file for ease. Thanks!
HousekeepingFrequency=1

### Option: MaxHousekeeperDelete
# The table "housekeeper" contains "tasks" for housekeeping procedure in the format:
# [housekeeperid], [tablename], [field], [value].
# No more than 'MaxHousekeeperDelete' rows (corresponding to [tablename], [field], [value])
# will be deleted per one task in one housekeeping cycle.
# If set to 0 then no limit is used at all. In this case you must know what you are doing!
#
# Mandatory: no
# Range: 0-1000000
# Default:
MaxHousekeeperDelete=50000

### Option: CacheSize
# Size of configuration cache, in bytes.
# Shared memory size for storing host, item and trigger data.
#
# Mandatory: no
# Range: 128K-8G
# Default:
CacheSize=4G

### Option: CacheUpdateFrequency
# How often Zabbix will perform update of configuration cache, in seconds.
#
# Mandatory: no
# Range: 1-3600
# Default:
# CacheUpdateFrequency=60

### Option: StartDBSyncers
# Number of pre-forked instances of DB Syncers.
#
# Mandatory: no
# Range: 1-100
# Default:
StartDBSyncers=50

### Option: HistoryCacheSize
# Size of history cache, in bytes.
# Shared memory size for storing history data.
#
# Mandatory: no
# Range: 128K-2G
# Default:
HistoryCacheSize=16M

### Option: HistoryIndexCacheSize
# Size of history index cache, in bytes.
# Shared memory size for indexing history cache.
#
# Mandatory: no
# Range: 128K-2G
# Default:
HistoryIndexCacheSize=100M

### Option: TrendCacheSize
# Size of trend cache, in bytes.
# Shared memory size for storing trends data.
#
# Mandatory: no
# Range: 128K-2G
# Default:
# TrendCacheSize=4M

### Option: ValueCacheSize
# Size of history value cache, in bytes.
# Shared memory size for caching item history data requests.
# Setting to 0 disables value cache.
#
# Mandatory: no
# Range: 0,128K-64G
# Default:
ValueCacheSize=100M


### Option: StartProxyPollers
# Number of pre-forked instances of pollers for passive proxies.
#
# Mandatory: no
# Range: 0-250
# Default:
# StartProxyPollers=1

[1berto]

A fast growing DB can be caused by a very small update interval of your items...
In fact the factors that affect the size of the database are:
1) Number of hosts
2) Number of items
3) Item update interval