MELVYL CATALOG DATABASE TELNET STATISTICS
Time period: 02/01/99 through 02/28/99
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 13,867 19,460 33,327
Davis 23,842 2,751 26,593
Irvine 10,478 0 10,478
Los Angeles 3,465 9,582 13,047
Riverside 8,089 1,767 9,856
San Diego 2,682 5,986 8,668
San Francisco 4,082 129 4,211
Santa Barbara 7,461 3,726 11,187
Santa Cruz 6,859 4,985 11,844
LBL 0 797 797
LLL 0 792 792
Other - UC 419 2,152 2,571
CSL 0 793 793
CSU n/a 2,652 2,652
Other-Network UC n/a 34,966 34,966
_______ ______ _____
81,244 90,538 171,782
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 2,720 14,797 89,572
2-4 a.m. 1,856 11,047 62,721
4-6 a.m. 1,608 8,074 45,499
6-8 a.m. 3,357 11,334 81,490
8-10 a.m. 15,732 47,558 361,003
10-12 a.m. 29,725 86,692 637,082
12-2 p.m. 32,124 90,830 682,479
2-4 p.m. 37,168 106,378 805,153
4-6 p.m. 24,969 71,719 546,064
6-8 p.m. 10,522 29,220 252,194
8-10 p.m. 7,347 20,215 158,414
10-12 p.m. 4,656 16,533 122,244
__________ __________ __________ _________________
Total: 171,784 514,397 3,843,915
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 44,356 51,637 95,993
Davis 78,448 8,119 86,567
Irvine 23,662 0 23,662
Los Angeles 6,279 15,472 21,751
Riverside 24,584 3,977 28,561
San Diego 7,402 8,511 15,913
San Francisco 5,676 192 5,868
Santa Barbara 27,662 8,194 35,856
Santa Cruz 18,457 17,317 35,774
LBL 0 1,430 1,430
LLL 0 1,529 1,529
Other - UC 296 5,259 5,555
CSL 0 1,433 1,433
CSU n/a 9,158 9,158
Other-Network UC n/a 145,347 145,347
_______ ______ _____
236,822 277,575 514,397
1.3 Records Displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 358,798 470,508 829,306
Davis 521,170 44,318 565,488
Irvine 186,504 0 186,504
Los Angeles 45,223 136,597 181,820
Riverside 161,855 46,240 208,095
San Diego 39,959 78,684 118,643
San Francisco 41,685 799 42,484
Santa Barbara 226,708 67,334 294,042
Santa Cruz 102,084 115,339 217,423
LBL 0 13,701 13,701
LLL 0 17,474 17,474
Other - UC 1,905 44,644 46,549
CSL 0 8,225 8,225
CSU n/a 94,498 94,498
Other-Network UC n/a 1,019,663 1,019,663
_______ ______ _____
1,685,891 2,158,024 3,843,915
1.4 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.8
Standard deviation in seconds 3.0
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.3
Standard deviation in seconds 2.1
2.0 COMMAND mode statistics:
____________________________
Longest session recorded (minutes:seconds) 994:40
Average number of searches completed per session 2.9
Retrievals per search - median 2.0
Retrievals per search - average 88.1
Retrievals per search - standard deviation 1132.1
Percent of searches completed with 0 results 31.0%
Percent of searches entered that are long 4.7%
Percent of long searches completed
(includes partial results) 51.2%
Commands entered, by type, excluding errors:
Total Percentage
FIND 499,879 35.0%
DISPLAY (excluding automatic displays) 409,042 28.6%
ACFIND 105 0.0%
BROWSE 3,479 0.2%
SELECT 2,273 0.2%
HELP 25,353 1.8%
EXPLAIN 20,295 1.4%
SET/RESET 30,257 2.1%
SHOW 4,847 0.3%
AT 24,594 1.7%
ADD ON (AND, OR, AND NOT) 14,339 1.0%
LOGON or LOGOFF 277,393 19.4%
COMMENT 788 0.1%
SAVE 13,419 0.9%
USE 20,545 1.4%
OTHER 83,300 5.8%
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTH 77,216 15.0% 19,642 25.4% 12 108.2 655.7
AUTHOR 31,028 6.0% 7,676 24.7% 14 126.6 574.3
CORPORATE AUTH 5,771 1.1% 2,304 39.9% 16 813.6 6707.1
EXACT CA 185 0.0% 94 50.8% 27 360.7 802.7
TITLE WORD 127,461 24.8% 42,238 33.1% 6 53.5 449.4
EXACT TITLE 61,960 12.1% 21,440 34.6% 2 28.0 192.3
TITLE -> TW 11,423 2.2% 2,827 24.7% 10 72.4 466.4
TITLE -> XT 13,764 2.7% 6,683 48.6% 1 18.9 586.0
SUBJECT 60,452 11.8% 25,478 42.1% 50 417.7 2573.8
EXACT SUBJECT 2,498 0.5% 1,082 43.3% 56 402.2 1433.6
PERIODICAL 68,723 13.4% 16,264 23.7% 6 135.5 1436.1
EXACT PE 27,634 5.4% 4,923 17.8% 3 33.4 544.6
RPE 80 0.0% 48 60.0% 25 158.7 475.2
XRP 4 0.0% 1 25.0% 6 494.3 849.3
COMMENTS 102 0.0% 27 26.5% 4,066 2626.5 1933.3
LANGUAGE 1,536 0.3% 399 26.0% 51 660.0 3682.5
DATE 4,885 1.0% 1,316 26.9% 4 118.5 1394.0
FORM 3,726 0.7% 920 24.7% 20 529.1 4193.9
NUMBER* 459 0.1% 196 42.7% 2 386.2 4288.9
MUSIC* 127 0.0% 83 65.4% 8 116.1 386.4
SERIES 7,855 1.5% 2,773 35.3% 6 66.1 238.0
UNIFORM TITLE 166 0.0% 84 50.6% 25 312.5 925.9
Other indexes 6,215 1.2% 3,268 52.6% 1 27.2 387.5
* Number indexes include REPORT NUMBER STOCK NUMBER,
GOVERNMENT DOCUMENTS, and GPO ITEM NUMBER;
Music indexes include MUSICAL KEY, MUSIC PUBLISHER, and THEMATIC
By number of indexes:
Multiple 23,927 4.9% 7,782 32.5% 4 114.0 1292.3
Single 464,229 95.1% 143,905 31.0% 7 129.1 1359.7
BROWSEs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. BROs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTH 570 17.7% 259 45.4% 4 30.5 68.4
CORPORATE AUTH 22 0.7% 7 31.8% 6 44.3 74.7
EXACT CA 13 0.4% 5 38.5% 24 79.5 117.0
SUBJECT 2,408 74.6% 585 24.3% 31 168.6 1095.4
EXACT SUBJECT 195 6.0% 51 26.2% 47 274.6 1573.0
UNIFORM TITLE 7 0.2% 5 71.4% 15 14.5 19.1
SERIES 12 0.4% 4 33.3% 4 38.1 68.2
By number of indexes:
Multiple 4 0.1% 2 50.0% 251 251.0 289.9
Single 3,271 99.9% 923 28.2% 24 153.4 1042.3
DISPLAY commands, by type, excluding automatic displays:
REVIEW 8.6%
BRIEF 74.1%
LONG 9.7%
MARC 3.8%
FIELDS 1.5%
TAG 1.1%
PERIODICALS 0.0%
COMMENTS 0.0%
Other (includes BROWSE, ACFIND) 1.2%
3.0 Error, EXPLAIN and HELP statistics
__________________________________________________________
Percent of commands that contained errors 10.3%
Ten most frequent errors:
1. First word of command is invalid 30.0%
2. NS command - no next screen 24.0%
3. FIND command with invalid index name 12.7%
4. KW search in database w/o KW index 4.8%
5. DISPLAY command contains invalid word 3.1%
6. Search term missing from search command 2.4%
7. DISPLAY command - no FIND results 2.1%
8. Valid command at an inappropriate time 1.9%
9. PS command - no previous screen 1.9%
10. Max. # of ports to a Z39 db are in use 1.7%
11. All others 15.4%
Ten most frequent EXPLAIN requests:
1. GUIDE 23.6%
2. FIND 14.1%
3. COMMAND WORDS 6.7%
4. INDEXES 6.5%
5. Unrecognized term 5.6%
6. PASSWORDS 3.8%
7. DATABASES 3.0%
8. DISPLAY 2.8%
9. LOCATE (PE DB) 2.3%
10. ADD-ON SEARCH 1.9%
11. All others 29.7%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 18.7%
2. First word of command is invalid 16.1%
3. FIND command with invalid index name 11.0%
4. DISPLAY command - middle of >1 screen 4.3%
5. KW search in database w/o KW index 3.5%
6. NS command - no next screen 3.1%
7. FIND command retrieves >1 book 2.8%
8. DISPLAY command-first of >1 screen 2.6%
9. Help requested from SET DB command 2.5%
10. TW search with zero results 2.4%
11. All others 33.0%
Ten most frequent SHOW requests:
1. HISTORY 27.6%
2. SEARCH 18.3%
3. GLOSSARY 11.8%
4. TIME 4.6%
5. SETTINGS 4.5%
6. MEDLINE NEWS 4.2%
7. MAIL STATUS 3.4%
8. NEWS 2.8%
9. DLA NEWS 2.6%
10. MAIL SETTINGS 1.2%
11. All others 19.0%