MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS
Time period: 05/18/02 through 05/24/02
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 25 377 402
Davis 183 21 204
Irvine 97 0 97
Los Angeles 1 200 201
Riverside 12 37 49
San Diego 51 150 201
San Francisco 98 0 98
Santa Barbara 4 71 75
Santa Cruz 3 27 30
LBL 0 90 90
LLL 0 39 39
Los Alamos n/a 0 0
Other - UC 1 49 50
U.S. Forestry 0
Other-Network UC n/a 217 217
_______ ______ _____
475 1,278 1,753
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 33 88 687
2-4 a.m. 23 151 1,866
4-6 a.m. 15 82 578
6-8 a.m. 49 157 1,009
8-10 a.m. 201 648 7,593
10-12 a.m. 323 986 9,303
12-2 p.m. 257 661 5,928
2-4 p.m. 329 922 13,407
4-6 p.m. 276 752 8,713
6-8 p.m. 116 371 2,606
8-10 p.m. 73 275 1,988
10-12 p.m. 58 221 1,761
__________ __________ __________ _________________
Total: 1,753 5,314 55,439
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 43 1,357 1,400
Davis 471 52 523
Irvine 283 0 283
Los Angeles 3 602 605
Riverside 19 106 125
San Diego 130 410 540
San Francisco 501 0 501
Santa Barbara 24 214 238
Santa Cruz 5 62 67
LBL 0 299 299
LLL 0 89 89
Los Alamos n/a 0 0
Other - UC 1 95 96
U.S. Forestry 0
Other-Network UC n/a 548 548
_______ ______ _____
1,480 3,834 5,314
Number of FIND commands by database
CC database 5,201
CCT database 113
Total number of FIND commands 5,314
1.3 Records displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 852 14,899 15,751
Davis 8,754 251 9,005
Irvine 2,497 0 2,497
Los Angeles 4 6,570 6,574
Riverside 132 1,651 1,783
San Diego 506 2,875 3,381
San Francisco 2,207 0 2,207
Santa Barbara 105 3,199 3,304
Santa Cruz 51 668 719
LBL 0 2,159 2,159
LLL 0 1,476 1,476
Los Alamos n/a 0 0
Other - UC 5 802 807
U.S. Forestry 0
Other-Network UC n/a 5,776 5,776
_______ ______ _____
15,113 40,326 55,439
Number of Records Displayed by database:
CC database 49,421
CCT database 6,018
Total number of Records Displayed 55,439
1.4 Relative Use of Databases
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Relative use of CC vs. CCT databases:
Percent of CC sessions 96.7%
Percent of CCT sessions 3.3%
Percent of searches done in the CC database 97.9%
Percent of searches done in the CCT database 2.1%
1.5 Response time
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Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 1.2
Standard deviation in seconds 4.7
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.1
Standard deviation in seconds 4.7
2.0 CC Database Statistics
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Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 265:23
Average number of searches completed per session 3.1
Retrievals per search - median 9.0
Retrievals per search - average 677.3
Retrievals per search - standard deviation 4532.2
Percent of searches completed with 0 results 20.6%
Percent of searches entered that are long 0.6%
Percent of long searches completed
(includes partial results) 71.9%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
FIND 4,721 37.1%
DISPLAY (excluding automatic displays) 3,753 29.5%
HELP 92 0.7%
EXPLAIN 91 0.7%
SET/RESET 653 5.1%
SHOW 15 0.1%
ADD ON (AND, OR, AND NOT) 480 3.8%
LOGON or LOGOFF 2,189 17.2%
COMMENT 0 0.0%
SAVE 232 1.8%
USE 2 0.0%
OTHER 508 4.0%
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 2,263 42.6% 349 15.4% 25 191.4 886.6
TITLE WORD 1,599 30.1% 465 29.1% 10 773.4 6821.0
EXACT TITLE 76 1.4% 38 50.0% 4 19.1 61.6
JOURNAL 295 5.5% 76 25.8% 710 3422.3 6913.9
EXACT JOURNAL 162 3.0% 29 17.9% 4,079 8828.1 10539.3
SUBJECT CAT 21 0.4% 5 23.8% 8 6970.6 27717.6
SUBFILE 7 0.1% 2 28.6% 73 83.8 75.3
PUBLICATION TYPE 46 0.9% 3 6.5% 12,928 14677.4 11591.4
LANGUAGE 5 0.1% 1 20.0% 725 668.3 514.1
DATE 150 2.8% 39 26.0% 5 135.2 505.3
ADDED 51 1.0% 19 37.3% 5 13.3 18.3
PERIODICAL 334 6.3% 40 12.0% 5 46.0 193.9
EXACT PE 50 0.9% 7 14.0% 3 33.1 175.2
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 259 4.9% 86 33.2% 19 518.0 3394.1
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 576 12.2% 162 28.1% 6 1588.6 5802.2
Single 4,127 87.8% 813 19.7% 25 820.0 5216.0
DISPLAY commands, by type, excluding automatic displays:
REVIEW 3.5%
SHORT 74.5%
LONG 4.7%
FIELDS 2.1%
PERIODICALS 13.7%
COMMENTS 0.0%
Other 1.6%
2.1 CCT Database Statistics
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Median session length (minutes:seconds) 0:00
Average session length (minutes:seconds) 0:00
Longest session recorded (minutes:seconds) 52:39
Average number of searches completed per session 1.9
Retrievals per search - median 81.0
Retrievals per search - average 237.1
Retrievals per search - standard deviation 479.2
Percent of searches completed with 0 results 19.5%
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 113 24.5%
DISPLAY (excluding automatic displays) 193 41.9%
HELP 26 5.6%
EXPLAIN 9 2.0%
SET/RESET 40 8.7%
SHOW 3 0.7%
ADD ON (AND, OR, AND NOT) 0 0.0%
LOGON or LOGOFF 59 12.8%
COMMENT 0 0.0%
SAVE 2 0.4%
USE 0 0.0%
OTHER 16 3.5%
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 46 40.7% 16 34.8% 206 475.3 740.7
EXACT JOURNAL 61 54.0% 5 8.2% 122 222.9 346.4
SUBJECT CAT 0 0.0% 0 0.0% 0 0.0 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 6 5.3% 1 16.7% 4 10.6 14.8
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 113 100% 22 19.5% 153 294.5 518.4
DISPLAY commands, by type, excluding automatic displays:
REVIEW 2.5%
ISSUES 51.5%
SHORT 10.9%
LONG 32.2%
PERIODICALS 2.5%
COMMENTS 0.0%
Other 0.5%
2.3 Error, EXPLAIN and HELP statistics (CC & CCT)
__________________________________________________
Percent of commands that contained errors 12.4%
Ten most frequent errors:
1. NS of SHOW/EXP command-no next screen 42.9%
2. NS command - no next screen 18.0%
3. First word of command is invalid 16.3%
4. FIND command with invalid index name 7.0%
5. Index invalid in current database 2.1%
6. DISPLAY command - no FIND results 1.8%
7. DISPLAY command contains invalid word 1.4%
8. Search term missing from search command 1.3%
9. PS command - no previous screen 1.1%
10. Command contains escape or arrow key 0.8%
11. All others 7.2%
Ten most frequent EXPLAIN requests:
1. CC GUIDE 20.0%
2. CC INDEXES 18.0%
3. FIND (CC DB) 16.0%
4. COMMANDS 6.0%
5. DATABASES 5.0%
6. CC DATABASE 5.0%
7. MAIL 3.0%
8. LOCATE (ARTICLE DBS) 3.0%
9. Unrecognized term 3.0%
10. DISPLAY 3.0%
11. All others 18.0%
Ten most frequent HELP situations:
1. Help requested from START CC command 18.3%
2. First word of command is invalid 17.0%
3. FIND command with invalid index name 8.3%
4. DISPLAY command - middle of >1 screen 8.3%
5. F/BR with index invalid in current DB 7.8%
6. Help requested from SET DB command 5.5%
7. Help requested from FIND PA command 5.5%
8. DISPLAY command-first of >1 screen 5.0%
9. FIND command with zero results 3.7%
10. NS of SHOW/EXP command-no next screen 3.2%
11. All others 17.4%
Ten most frequent SHOW requests:
1. HISTORY 44.4%
2. SEARCH 22.2%
3. SYSTEM NEWS 16.7%
4. CC NEWS 11.1%
5. CC GLOSSARY 5.6%
11. All others 0.0%
Cmm/yy cc MELVYL CURRENT CONTENTS DATABASE TELNET STATISTICS (monthly)