Cache utilization

Hi Surya,

Try this--

root@chslyp10-/usr/symcli/bin> symqos -sid 3889 list -cp -settings -usage

Symmetrix ID: 000290103889

    Cache Partitioning         : Enabled

    Number of Partitions       : 4

    Max Num of Partitions      : 8

    Min Allowed Target %       : 10

    Max Allowed Target %       : 90

    XRC Partition State        : Disabled

    XRC Partition Name         : N/A

    Empty Partition State      : Preserve

    Time of Last Modification  : 01:49:08 PM on Fri Nov 25,2011

                                                         Cache Slots

                   Min  Tgt  Max  WP   Time   Device  ------------------  Used

Partition Name     (%)  (%)  (%)  (%)  (s)    Count      WP       Used    (%)

-----------------  ---  ---  ---  ---  -----  ------  --------  --------  ----

DEFAULT_PARTITION    0   47  100   80    300    8103    573757   2189246    72

ACP                  0   10   10   80    300      31       157       348     0

mainframe           23   23   23   80    300    2780     71673    690717    23

BIGWASR              5   20   20   80    300     540       574    146196     5

What do you mean by cache utilization?  Do you mean write pending counts or hit rates?

Hi,

We are getting the following alert daily.

This is an automated message. Please do not reply.

SPA has detected the following performance alert(s):

1 CRITICAL (CLEARED)

Symmetrix: 000190103985

Timestamp: Mon Dec 12 20:00:00 EST 2011

Description: % Cache WP (97.4) exceeds threshold (60.0)

Regards

Murthy

SAN/TSM Support | The Home Depot

Desk : 770-574-4233/678-608-3873| Mobile : +91- 996 254 7313

Email : TCS_SAN_SUPPORT/TCS_TSM_SUPPORT

SAN Pager On-Call : TCS_SAN_SUPPORT

TSM Pager On-Call : TCS_TSM_SUPPORT

SAN Tickets Should be logged in : SANSTORAGE

TSM Tickets Should be logged in: BACKUPSTORAGE

That means Alert has been configured like this.Your Write Pending (WP) limit is reaching its threshold and near to 100% which is not ok....I think you need to investigate your SYMM Performance in detail.

Hi Rahman,

We already raised SR for this request.

Thanks.

Regards

Murthy

SAN/TSM Support | The Home Depot

Desk : 770-574-4233/678-608-3873| Mobile : +91- 996 254 7313

Email : TCS_SAN_SUPPORT/TCS_TSM_SUPPORT

SAN Pager On-Call : TCS_SAN_SUPPORT

TSM Pager On-Call : TCS_TSM_SUPPORT

SAN Tickets Should be logged in : SANSTORAGE

TSM Tickets Should be logged in: BACKUPSTORAGE

Hi Surya,

I am assuming you are running SPA to monitor the symm. What does it shows? Do you see some issues in SPA?

regards,

Saurabh

symcfg list -v will show the device and system WP limits for a given system.

symstat -i x (sec) will show the WP count per volume, and also the sum for the system.

How to check "Write Pending data % " in symmetrix.

Thanks in advance......