MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS
Time period: 04/28/01 through 05/04/01
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 100 669 769
Davis 325 15 340
Irvine 298 0 298
Los Angeles 5 258 263
Riverside 34 52 86
San Diego 61 261 322
San Francisco 208 0 208
Santa Barbara 17 163 180
Santa Cruz 21 90 111
LBL 0 88 88
LLL 0 57 57
Los Alamos n/a 0 0
Other - UC 2 45 47
U.S. Forestry 0
Other-Network UC n/a 489 489
_______ ______ _____
1,071 2,187 3,258
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 41 168 1,444
2-4 a.m. 20 123 3,326
4-6 a.m. 24 58 1,005
6-8 a.m. 80 572 5,472
8-10 a.m. 352 1,140 12,171
10-12 a.m. 622 1,748 16,449
12-2 p.m. 594 1,586 15,950
2-4 p.m. 635 1,721 13,416
4-6 p.m. 485 1,344 10,587
6-8 p.m. 195 547 5,944
8-10 p.m. 140 344 3,069
10-12 p.m. 70 157 1,221
__________ __________ __________ _________________
Total: 3,258 9,508 90,054
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 180 1,862 2,042
Davis 1,010 50 1,060
Irvine 960 0 960
Los Angeles 7 671 678
Riverside 43 191 234
San Diego 133 767 900
San Francisco 557 0 557
Santa Barbara 27 469 496
Santa Cruz 61 325 386
LBL 0 238 238
LLL 0 747 747
Los Alamos n/a 0 0
Other - UC 15 120 135
U.S. Forestry 0
Other-Network UC n/a 1,075 1,075
_______ ______ _____
2,993 6,515 9,508
Number of FIND commands by database
CC database 9,212
CCT database 296
Total number of FIND commands 9,508
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,805 21,604 23,409
Davis 8,401 188 8,589
Irvine 6,423 0 6,423
Los Angeles 35 6,316 6,351
Riverside 298 1,684 1,982
San Diego 1,254 7,061 8,315
San Francisco 4,597 0 4,597
Santa Barbara 1,715 4,141 5,856
Santa Cruz 477 3,316 3,793
LBL 0 2,406 2,406
LLL 0 7,562 7,562
Los Alamos n/a 0 0
Other - UC 4 1,158 1,162
U.S. Forestry 0
Other-Network UC n/a 9,609 9,609
_______ ______ _____
25,009 65,045 90,054
Number of Records Displayed by database:
CC database 77,592
CCT database 12,462
Total number of Records Displayed 90,054
1.4 Relative Use of Databases
______________________________
Relative use of CC vs. CCT databases:
Percent of CC sessions 95.3%
Percent of CCT sessions 4.7%
Percent of searches done in the CC database 96.9%
Percent of searches done in the CCT database 3.1%
1.5 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.9
Standard deviation in seconds 4.0
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 4.0
2.0 CC Database Statistics
___________________________
Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 437:31
Average number of searches completed per session 3.0
Retrievals per search - median 10.0
Retrievals per search - average 599.5
Retrievals per search - standard deviation 9248.6
Percent of searches completed with 0 results 24.7%
Percent of searches entered that are long 0.3%
Percent of long searches completed
(includes partial results) 63.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 8,575 37.8%
DISPLAY (excluding automatic displays) 6,506 28.7%
HELP 213 0.9%
EXPLAIN 230 1.0%
SET/RESET 1,214 5.3%
SHOW 22 0.1%
ADD ON (AND, OR, AND NOT) 637 2.8%
LOGON or LOGOFF 3,982 17.5%
COMMENT 0 0.0%
SAVE 256 1.1%
USE 9 0.0%
OTHER 1,052 4.6%
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 AUTHOR 4,264 42.8% 671 15.7% 30 237.9 1682.7
TITLE WORD 2,882 28.9% 887 30.8% 14 566.5 4348.0
EXACT TITLE 93 0.9% 41 44.1% 3 18.3 49.7
JOURNAL 536 5.4% 202 37.7% 378 8230.5 45662.2
EXACT JOURNAL 509 5.1% 282 55.4% 36 1268.5 5584.9
SUBJECT CAT 38 0.4% 4 10.5% 19 28.6 36.0
SUBFILE 14 0.1% 0 0.0% 76 2043.2 5857.1
PUBLICATION TYPE 41 0.4% 7 17.1% 5 1728.7 9378.5
LANGUAGE 1 0.0% 0 0.0% 84 84.0 0.0
DATE 198 2.0% 37 18.7% 10 92.8 244.4
ADDED 613 6.1% 385 62.8% 22 29.2 28.6
PERIODICAL 232 2.3% 42 18.1% 7 72.9 485.0
EXACT PE 42 0.4% 2 4.8% 3 14.5 42.8
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 507 5.1% 135 26.6% 22 839.8 4682.2
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By number of indexes:
Multiple 1,394 16.3% 637 45.7% 10 77.3 825.1
Single 7,149 83.7% 1,408 19.7% 32 930.6 11649.8
DISPLAY commands, by type, excluding automatic displays:
REVIEW 5.5%
SHORT 80.5%
LONG 5.0%
FIELDS 2.2%
PERIODICALS 5.5%
COMMENTS 0.0%
Other 1.3%
2.1 CCT Database Statistics
____________________________
Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 244:35
Average number of searches completed per session 1.9
Retrievals per search - median 48.0
Retrievals per search - average 395.0
Retrievals per search - standard deviation 2206.5
Percent of searches completed with 0 results 22.3%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 0.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 294 26.7%
DISPLAY (excluding automatic displays) 450 40.8%
HELP 51 4.6%
EXPLAIN 24 2.2%
SET/RESET 99 9.0%
SHOW 8 0.7%
ADD ON (AND, OR, AND NOT) 2 0.2%
LOGON or LOGOFF 147 13.3%
COMMENT 0 0.0%
SAVE 0 0.0%
USE 0 0.0%
OTHER 28 2.5%
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:
JOURNAL 188 63.9% 50 26.6% 98 700.9 3159.6
EXACT JOURNAL 70 23.8% 12 17.1% 86 242.6 407.3
SUBJECT CAT 1 0.3% 0 0.0% 5,833 5833.0 0.0
SUBFILE 0 0.0% 0 0.0% 0 0.0 0.0
DATE 0 0.0% 0 0.0% 0 0.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PERIODICAL 0 0.0% 0 0.0% 0 0.0 0.0
EXACT PE 0 0.0% 0 0.0% 0 0.0 0.0
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 0 0.0% 0 0.0% 0 0.0 0.0
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 35 11.9% 3 8.6% 3 8.0 9.5
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 294 100% 65 22.1% 72 510.4 2498.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 11.7%
ISSUES 40.5%
SHORT 23.5%
LONG 14.3%
PERIODICALS 8.8%
COMMENTS 0.0%
Other 1.2%
2.3 Error, EXPLAIN and HELP statistics (CC & CCT)
__________________________________________________
Percent of commands that contained errors 8.1%
Ten most frequent errors:
1. NS command - no next screen 32.9%
2. First word of command is invalid 27.9%
3. FIND command with invalid index name 9.4%
4. Index invalid in current database 4.2%
5. DISPLAY command - no FIND results 2.1%
6. Max. # of ports to a Z39 db are in use 2.0%
7. DISPLAY command contains invalid word 1.9%
8. Search term missing from search command 1.8%
9. D ABS command in database w/o abstracts 1.6%
10. Valid command at an inappropriate time 1.5%
11. All others 14.6%
Ten most frequent EXPLAIN requests:
1. CC GUIDE 15.0%
2. CC INDEXES 13.8%
3. FIND (CC DB) 13.4%
4. COMMANDS 9.8%
5. LOCATE (ARTICLE DBS) 7.9%
6. Unrecognized term 5.5%
7. DATABASES 4.3%
8. CC DATABASE 4.3%
9. FIND (CCT DB) 2.4%
10. CCT INDEXES 2.4%
11. All others 21.3%
Ten most frequent HELP situations:
1. Help requested from START CC command 19.3%
2. First word of command is invalid 15.3%
3. F/BR with index invalid in current DB 8.1%
4. Help requested from SET DB command 7.9%
5. FIND command with invalid index name 7.7%
6. DISPLAY command - middle of >1 screen 5.4%
7. FIND command with zero results 5.2%
8. NS command - no next screen 3.1%
9. DISPLAY command-first of >1 screen 2.7%
10. DISPLAY command-complete in one screen 2.5%
11. All others 22.8%
Ten most frequent SHOW requests:
1. HISTORY 53.3%
2. CC GLOSSARY 10.0%
3. CC NEWS 10.0%
4. SYSTEM NEWS 6.7%
5. SC LIST (CC DBS) 6.7%
6. SEARCH 6.7%
7. LOCAL INFORMATION 3.3%
8. CCT SETTINGS 3.3%
11. All others 0.0%
Cmm/yy cc MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS (monthly)